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dBTrait 4.0 User Manual

1. ccccccccccccccccc cece cece cece cece eee EEE EERE EEE EERE EE 17 3 1 5 Pore a t Moda ona E CE 17 3 1 6 Close a CMG GOO O asa AT E EET T EEA AROA AEO 17 Ad DOVER ACT QUITE a lactate isoastilbin aces S EUER 17 3 1 8 E CC MGC BOO aissis ia iere cont etseatsotete edite cedat otter paalogantd Traci ar ne e uerus 17 3 1 9 Import LEO datdiiesqo Me new Jorma lossin e R S e nailed tendre E cd scuta M red c E De 18 3 1 10 Export audio records at the WAV file format secsoissessstvsadeesavsvestidssoueasocsdiaarsawessayJuiaiedisadenealdapsanvsan seeatedenanccuer nee 19 3 1 11 Data storage type concatenate or not all files into a single CMG file sees 20 3 1 12 Concatenation of measurement sessions isses eene ehe hehe hehehe EE AEE re nnn 20 SA DOCUMENT DEPENDENCIESAN A CM O RILE eee oi oe Sob uius kta eat Sacto Set dud EE 2l 3 3 SUMMARY FILES USED BY DBENV32 DBTRIG32 DBTRAIT32 eessseeeeeeeeeeeeeee nnns 23 Ay EME HISTORY PLO Triero dene quer ete eee reda vr CR Ee ttr enu e ue sis ipee Den eere ov eer deed 25 4 1 CONFIGURATION PARAMETERS OP THEEPOT e pece usted seus aote ima esse items luda deb dekseas dissed Reps lesse T 25 4 2 TIME HISTORY PLOT DISPLAY nanena ENE EE EE EEA 24 4 3 TIMEHISTORY PEOT TOOLBARS TIME HIS TORY MENU Go dis catos Bassi KE EE s bloete Wanceseuceantet RU EE Lus e te Gades Nes aM RD 28 4 3 1 Sebdup evaphical display Parameters de scan J losers tii eescte stie Menara Mise d den E D
2. P H EA E e Se au MICE e P 2z 20 6 P4 2 12200 16 5 Spectra It is a representation of the frequency components of a signal A spectrum of a signal is obtained via frequency analysis It is usually displayed in one of the following forms narrow bands octave bands third octave bands CHAPTER 16 GLOSSARY PAGE 98 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 5 1 Octave and third octave bands An octave band is a frequency band whose pass band limit follows a ration of 2 between a given frequency and the double of it An octave is determined by its central frequency A third octave band is frequency band whose pass band limits follows a ration of 2 The usual octave and third octaves bands are centred on preferred frequencies as describes in IEC 1260 16 5 2 Octave and third octave standardised bandwidth and centre frequencies N Designation Third octave Width Octave pass band Passband 42 14 1 17 8 kHz 3700 Hz 11 2 22 4 kHz 11200 Hz 5620 11200 Hz 5600 Hz 2820 5620 Hz 2820 Hz 1410 2820 Hz 1410 Hz 708 1410 Hz 708 Hz 355 708 Hz 355 Hz 24 250Hz 224282Hz 58Hz 178 355 Hz 178 Hz 89 1 178 Hz 89 1 Hz 44 7 89 1 Hz 44 7 Hz 22 4 44 7 Hz 22 4 Hz 11 2 22 4 Hz 11 2 Hz 9 8Hz 708891Hz 183Hz 5 62 11 2 Hz 5 62 Hz 8 63Hz 562708Hz 146Hz 6 4Hz 355447Hz 092Hz 2 82 5 62 Hz 2 82 Hz 1 41 2 82 Hz 1 41 Hz iHz 0OS891 112Hz 0 229Hz 0 708 1 41 Hz 0 708 Hz 08Hz 0 05 0 91Hz 0
3. CHAPTER 11 RESULT EXPLOITATION amp CUSTOMISATION PAGE 72 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 AUTOMATIC PROCESSING OPTION In dBTRAIT32 Several measurement session datafiles can be analysed automatically The analysis consists of the simultaneous execution of a number of operations defined by the user in a script The results of the processing can be displayed on the screen Display Simulation printed Printer or sent to a set of files Files The files containing the results can then be resumed in a word or spreadsheet processor The software allows the user to define and save these scripts in files for later use A script contains a list of operations to carry out on the CMG files All the options of the Display menu can therefore be assimilated to a single operation and can form part of a script An operation of the same type can be part of the script several times with different parameters e g Plot on the time history over a period of one hour and another plot over a period of 10 minutes All the operations are completely carried out for the duration of each file A script is saved in a file whose extension is FAS File Automatic Script by default 12 1 Script capture The capture only allows the definition of a new script It is not possible to modify an existing one Each step necessary to define a new script is shown below Opening a CMG data file The definition of a new script is based on the anal
4. 00 01 00 8 j Round 83 8 35 30 50 1085 Object ta copy on validation of the previous dialog box the calculations are made and a table of results is displayed Then use the command Edit Copy The opposite dialog box is displayed C Graphic Select Binary data in the field Object to copy 8B dpTraiti Iof x ES create a new CMG datafile by the command File New and give a File DBTRAITI name to this file An empty datafile is created and its information window percentile time history exampl is shown on screen Empty file It is also possible to paste the binary data in an existing datafile E File DBTRAIT2 i JE t Ln time hist Use the command Edit Paste to copy the binary ere f Stat o 07 41 00 vendredi novembre 1997 data relative to percentiles in the empty datafile All data En 11 01 00 vendredi 7 novembre 1997 contained in the previous table of results is then pasted mo 1 Ime Oasis m into the empty file Total nb af periods 200 came we ws Min Max A 40 The information window then looks like this Croix Pusi Leg rU Croix Pusi Leg Min A 3n BO Croix Pusi Leg Max A 40 B Croix Pusi L99 0 Leg Max A aU BU Croix Pusi 35 0 Leg Max A aU B Croix Fusi L90 0 Leg Max A 30 B Croix Fusi L50 0 Leg Max A 40 r0 Croix Pusi L10 0 Leg Max A 40 o0 Croix Pusi L O Leg Max A 40 o0 Croix Pusi L5 0 Leg
5. 655 660 b 6 690 692 69 4 BALE CMG 08 11 94 07 00 00 09 11 94 07 00 00 leq A 62 1 53 2 708 Sa 556 564 553 666 66 8 67 2 BAL CMG 08 1 94 07 00 00 1011 94 07 00 00 leq A 582 531 70 533 542 557 570 598 600 603 BALB CMG 10 11 94 07 00 00 117114 07 00 00 leq A 5497510 718 511 516 520 53 4 574 57 7 58 1 BALL EMG 03 11 94 07 00 00 04 11 94 07 00 00 leq amp 68 5 568 106 4 577 605 611 562 5 64 2 64 5 646 This is a standard list of dBTRAIT32 it can be printed or transferred by a simple copy paste action to another application without recourse to particular importation of text or table processors There will be as many summary windows as listing operations Leg and Ln indices in the script CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 77 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 4 Resumption by spreadsheet or word processors 12 4 1 Resumption of graphical results Reminder The graphical results are stored in the files having the name of the acoustical data file with the extensions TOO TO1 etc and they are found in the sub directory of the data index carrying the script file name These files are in the Windows metafile format Usually Windows attaches the extension WMF to files of this type The complexity of the automatic analysis file manager leads us to choose non standard extensions Nevertheless the WMF format is respected and the resum
6. It is possible to navigate from a time section of the data file to another by using the icons I or the commands Graph File start Previous section Next section File end if the time history plot display does not cover the complete duration of the datafile Example For a 24 hour measurement file starting at 08 00am and ending at 08 00am the next day the operator display a time history plot for the time portion starting at 16 00 and ending at 17 00 Click on the icon to display the next time portion of the plot 17 00 18 00 then Click on the icon to display the last time portion of the plot 07 00 08 00 then Click on the icon lt to display the previous time portion of the plot 06 00 07 00 then Click on the icon i to display the first time portion of the plot 08 00 09 00 If the complete file is displayed on the plot the time portion icons cannot be accessed greyed CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 38 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 5 3 3 Playback an audio record Aux menu When audio signals have been recorded at the time of acquisition it is possible to play them back through the computer sound system Audio replay can be achieved from the Aux menu of dBTRAIT32 ei Wk E E A To do so click on the icon or use the command Aux 07 11 97 07 46 05 10s CroxPusi 1 12800 0 Audio Replay If more than one audio files have been recorded 07711797 07 47 35
7. leq lan Xpusx10 leq aside appears QMSEISE _puss06S leq pus leq Spuss112 leq lx _pusx1 OF leq x Apusatl3 leq Select the directory and the LEQ file to import in the list Then click on the Open key File name pus 001 deq Files of type od Leg File leq Cancel D idB data sakolas pusi Xpus 001 leq dBTRAIT32 then starts the importation process A dialog box shows the progress Data imported is stored in the CMG file that was opened previously 5o EE After data from the main LEQ file has been transferred dBTRAIT32 imports all the auxiliary data referenced comments audio recordings multispectra noise source codes etc m When the importation process is ended the CMG file that was previously opened is updated The main information window is displayed on screen and looks like this EIE Jox Es BETRA Import file PUSIGNAN start 07 41 01 vendredi novembre 1997 End 11 00 23 vendredi 7 novembre 1997 i 11963 Vin Wax Croix Pusi Leg Ay 30 ou Croix Pusi Peak Lin e0 100 Croix Pusi Multispectra 1 3 Oct Leg an Source Code Avion 4 Train 5 forture b Mata D Chien faboyement 8 a Save the measurement session by using the command File Save CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT32 PAGE 18 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 1 10 Export audio records at the WAV file format It is possible to export audio records at the WAV file format Microsoft compatible of O
8. offers three different possibilities for the operation Object to copy Binary data leg tine base os displayed fv Elemental r Channels As displayed C aJ Domain Cursors C Time History Complete File dv Include Codes Cancel Copy graphic This function directly copies the graph as shown on screen except for the curve colours that have to be set in a different dialog box It then can be paste in a word processor G This functions copies as well the cursors if they are shown on screen Copy values This function copies the values of the noise data into a spreadsheet processor The user may copy the original data values Elemental Leq time base or the Leq values recomposed according to a greater time base if used in the time history plot Leq time base as displayed The user may also copy the codes information tick the box Include Codes all the measurement channels contained in the CMG file Channels All or only the ones displayed on the plot Channels As displayed The time domain for copying the noise data can correspond to the complete file the data displayed in the time history or the data contained in between the cursors Copy binary data It is the same principle as for copying tabulated values but this command is used to paste the values in a new or an existing CMG file This option is mainly used to keep only part of the CMG file only one
9. resolution The statistical indices in dBTRAIT32 are calculated with a resolution of 0 5 dB by default One may have noticed that in some listings the Lmax value was inferior to the LO value This is due to calculus limits in the base class of the indices LO is rounded to the nearest approximate value Lmax being calculated with the true values of the data file The 0 5dB resolution limit was originally defined to save computer memory For a file between 20 and 100 dB a histogram the basis of any statistical calculus with a resolution of 0 1dB will take up to 3204 bytes of computer memory 801 data values per measurement channel Tf this calculus has to repeat for many consecutive periods the memory requirements will be even larger A 0 5 dB resolution reduces the memory needs by a factor 5 Experience shows that this limit is never a problem as statistical results can take another approximation However it is possible to have a better resolution down to 0 1dB for the storage of LEQ files It can be defined under the line LnResolution of the Settings section of the dBTRAIT INI file For example to obtain the smallest resolution 0 1 dB this section will be Settings LnResolution 1 The contrary resolution superior to 0 5 dB is also possible If your computer shows problems when calculating Statistical indices example indices every minute for one week of data the result accuracy can be decreased to reduce the memory n
10. 04 000 Settings ContinuousSource 2 Total 10 0 00 26 500 78 1 88 0 92 3 The listing will then be The code 1 eliminate residual sources CHAPTER 14 HIDDEN FUNCTIONS OF DBTRAIT 32 GLOK BUTIFQ Source Usine Lieu Mein B ro Fast Pond ration LIN D but 11 34 45 000 15 04 95 Fin 11 35 55 000 15 04 95 Cmax SEL Appartion Dur e ER 11 35 05 750 15 04 95 D D0 06 375 11 35 21 000 15 04 95 0 00 06 000 11 37 000 15 04 95 0 00 05 875 0 00 26 500 may be specified above so that the count of sources events is not affected by possible PAGE 88 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 14 3 Time history of percentiles It is possible in dBTRAIT32 to access to the time history of percentiles using the binary cut and paste function of the software To do so follow the procedure shown below Leq and Ln Table by Period Channel Lok ne a m E Cancel Q After opening the datafile of interest use the em command Display Leq and Ln per period as Crois Pusi 20Hz Lin explained in the paragraph 8 1 2 and select the Crois Pusi 25Hz Lin E lia Pus H BH lin statistical indices to calculate r40 or sar These percentiles will be the ones that will be plotted as a time history later on End Iv Lmax ji 00 23 OF 711 4199 5 W Standard deviation Takt Mavimal Js 5s Select the period carefully as well because it will FINUM T suisses represent the time basis of the plot
11. 100ms Labels for the noise sources The spectral time history plot window features a tool bar that gives access to functions such as coding a noise source between cursors calculations of averaged minimum and maximum spectra calculations of A B or C weighted spectra etc The information bars for auxiliary data are not displayed in the spectral time history plot However they can be accessed through the commands of the Aux menu 5 3 Spectral time history plot toolbar Graph menu Plot parameters E Calculate and display the averaged spectrum for the time portion between the cursors positions yellow line in the Parameters for the graphical display middle Ing Calculate and display the minimum spectrum for the time portion between the cursors positions yellow line at the bottom Identify a noise source code for the time portion between the cursors positions Calculate and display the maximum spectrum for the time OOM ON dne Mc glory Becton in portion between the cursors positions yellow line at the top between the cursors End of the zoom Go back to previous Calculate display the A weighted spectrum view Calculate display the B weighted spectrum Display the first section of the file Calculate display the C weighted spectrum Display the previous section of the file Calculate display the U weighted spectrum user defined Display the next section of the file a E a a o amp Listing of mini
12. 183Hz CHAPTER 16 GLOSSARY PAGE 99 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 17 APPENDIX 17 1 Editing the software licence number Use this command menu About dBTRAIT to obtain general information on the software version copyright and licence number About DETRAIT Version 4 001 Copyright 01dB 1333 38 License number HHA RK PUR NUR d01idB Luocoustioue nume ernque If the licence number of the software module has to be modified click on the key Licence number The following dialog box appears on screen Edition of the license number Application POOR HOOK cancel Enter the new licence number provided by 01dB technical support Start again the application software in order to account for this modification CHAPTER 17 APPENDIX PAGE 101
13. 44 6 2 1 TIMOCOROLTON a cease pac stein Dic eases ne DU Fa DEL SS Drs cr we nse hema ca cub pb 44 6 2 2 Tres ONE CONATI ON S nee ao ettet ie tva ibas pu tue teo cu tae tu ce bct ununi eductus d cce C 44 6 2 3 Delim ons Of code 01717719 CIS RSEN UPS 45 6 2 4 Code d nibe P DELOFV FWIO oett Dabei tt bitte belit tibus ctae diede dieid A 45 6 3 CODINGCOMMANDSIN DBERZUDLTS 2 6st o eamdem ittm indu esca usc ilL An N D reed EH 47 6 3 1 Source between cursors Graph or Time history menus eene eene enne eene enne 47 6 3 2 Identifying using time condition Source menu eese i i i rns 47 6 3 3 Identifying using threshold condition Source menu esee tns 48 6 3 4 EYOmpleur TAreshold COC TIVO csc ascends tN ase esse attest atte amt EAD eu eL aa 49 6 3 5 Modifications of existing sources Source menti isseire e e d dca esate dca ee epa iaa Fen eR eu a sdb hanna DAR date 49 6 3 6 Convert audi records THO SOUTE EN uoo S pidas s v Dusk ute ve io vean suc pui ta duse ive tadiadue lie ANA 50 6 3 7 CONVERECOMMENIS TRIOSSOHECOS ed E E diese du E ed abel teet dread Leica tet sche Cid 50 Te STATISTICAL DIS TRIBUTION BE OT Svc ccs cccssccoccsscsseexcesecesssuseunadeunssoaesscccvedsvesenanancouussuseuedeuentancedwoosecesnassasedoepensevactensees 51 Te li AMPLITUDE DISTRIBU TION PLOT antenie oet aa A edes ioa Ae Ea 51 TARI CONUEATIVE DISTRIBUTION fd eiecti a a eee Cou dies abita ues educa lumus 52 8 TABLEOFRESUL TS cc EER OE
14. AH in x Items Select the time Start M Leg Select the acoustical gt portion of the data WFO OF Age n Iv Lmin parameters to file to consider Iv Lmas calculate End Standard deviation D0 23 07711 1393 L X akhama e dete bs v Statistical levels Daily 99 8 9590501085 Carcel The option Daily means that the acoustical parameters will be calculated day by day In other words one can obtain the daily results for measurement datafiles that last over several days This option is greyed if calculations apply to weekly periods It has another limitation It can only be applied when a single daily 24 hour period is selected The option will therefore also be greyed if two 24 hour cycles are selected in the above dialog box This limitation is due to the complexity of such listing CHAPTER 8 TABLE OF RESULTS PAGE 55 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL The window shown below shows a sample statutory periods listing b Statutory periods 60311000 CMG El B0311000 CMG ofice Weighting A Start 03 11 94 07 00 00 12 11 84 21 00 00 doy 08 00 20 00 Date Leg Lmin Umax 199 8 155 50 5o Lo 5 i5 0341 1994 528 558 700 575 6041 609 626 B42 644 647 D4 1 1994 600 482 703 484 508 572 588 617 619 623 05411 1994 559 466 B35 466 481 48B 552 587 589 582 06 11 1994 60 2 548 672 554 570 575 599 618 619 623 0741 1994 677 625 719
15. Di Dads DISDIAV NOI CUCIG DY nime POTONS siorse ei e o a a haces tester Lea cera sun tecto cM rU ree el 38 3 9 9 PIO DOCK n audio record LAUK ORI usos odit cato No DU eu atc eeu tease hen ue read eee Sid ce LED 39 5 4 OPERATIONS ON THE SPECTRAL TIME HISTORY GRAPH MENU ieaceu aate bate e an So as tde Petra tance i e ebd beau 39 5 4 1 Interactions between spectrum and time history plot sesenta 39 5 4 2 Maximum minimum and averaged spectra is teer nidi FU epe passu pK eeu tee Pose danseuse parens dE OR REP EE 39 5 4 3 Frequency weightings for the spectra A B C and user defined sees 40 Dio LISTING SPECTRA VALUES BETWEEN CURSORS 25 toit eiie ut tp situe ubat items ul etes e scires ade ut taba aneegats 40 2 6 CODING A NOISE SOURCE GRAPH MENU ed ee tedeecs thai ec erani ce datu a bactuce tee mibi ius 41 Important Notice Because this software package is modular in structure some of the functions described in this manual may not be available in your copy of the software To upgrade your version with optional modules contact your O1dB agent TABLE OF CONTENTS PAGE 5 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 IDENTIFICATION OE NOISE SOURCES eee iio Ei ERRANEN RE FRE agua ENEO Tv eUr Ka s Ne abre ERR uua 43 6 1 ADVANTAGES OF CODIN zem ee aa aes LM t I aaa a MO 43 6 2 SOURCE IDENTIFICATION TECHNIQUES 4 5 uestcioe sese tds vue chc obere e o epe tea CE p Ronee d CoD E cbe aed eid oM av ec tds ee ced ees
16. Max E 40 o0 CHAPTER 14 HIDDEN FUNCTIONS OF DBTRAIT32 PAGE 89 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Q when the operation is completed the information of the CMG file features the channels containing the time history of the paste statistical indices Save this file by the command File Save The user can now display the time history plot of any channels contained in the datafile e By using the command Display Time history we obtain a time history plot of percentiles An example is shown below See chapter 4 for more details P Time History 1m BDBTRAIT IL m mee s sl Croix Pusi L90 0 Leg Max 1m A Croix Pusi L10 0 Leq Max Im A G The user can also copy this plot into a word processor or copy the values into a spreadsheet processor or print directly the results as explained in chapter 11 CHAPTER 14 HIDDEN FUNCTIONS OF DBTRAIT32 PAGE 90 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 15 TROUBLESHOOTING When printing graphics some noise time histories are not shown The colours that are displayed on screen and on the printer are defined by different commands If a curve is not displayed correctly check The background colour of the graph The Y axis dynamic range CHAPTER 15 TROUBLESHOOTING PAGE 91 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 GLOSSARY 16 1 Overall acoustical quantities 16 1 1 Sound pressure level Lp 2 It is given by the formula L 10 La Prit F ret Wh
17. Period and Step define respectively the cumulated duration for the calculation of the loudest and or quietest periods and the time step for intermediate calculations In our example with a step of 1 minute and a period of 30 minutes the software will calculate the Leq minute by minute and by comparison of these intermediate calculations will calculate the loudest and quietest 30 minutes of the datafile CHAPTER 8 TABLE OF RESULTS PAGE 56 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Select Standard deviation to display the deviation between minimum and maximum values of the noise levels over the cumulated duration of the period Select Compare to a percentile and type in the Ln index to compare the equivalent sound pressure levels and the defined percentile over the cumulated duration of the period On validation of these parameters dBTRAIT32 calculates the loudest and or the quietest periods for the selected time portion of the datafile The resulting table is displayed in another window such as shown below i Loudest Period relative E PUSIGNAN SATOLAS CMG Croix Pus Weighting A start 0711 37 07 41 01 07117 11 00 23 Period 3m start 07117 08 42 01 a 07117 09 12 01 Level 52 9 dBA 35 48 8 dBA evel L35 40 dBA Loudest Period relative 30m start 0771137 09 14 01 End OFT 09 44 01 Level 55 2 dBA L35 42 1 dBA Level L95 13 1 dBA CHAPTER 8 TABLE OF RESULTS PAGE 57 DBTRAIT32 SOFTWARE PACKA
18. SLOW time weighting This is the result of an RC type integration with 1 second time constant As the input level varies from X to Y and remains at Y the time constant is the time requested by the detector to reach 63 of the distance between X and Y For the Slow time weighting TC 1000 milliseconds 16 3 2 FAST time weighting This is the result of an RC type integration with 125 milliseconds time constant As the input level varies from X to Y and remains at Y the time constant is the time requested by the detector to reach 63 9o of the distance between X and Y For the Fast time weighting TC 125 milliseconds 16 3 3 IMPULSE time weighting This weighting is a combined result of an RC type integration with 35 milliseconds time constant for increasing slope followed by an RC type integration with 35 milliseconds time constant for decreasing slope For the Impulse time weighting TC 35 milliseconds increasing level and TC 3000 milliseconds decreasing level CHAPTER 16 GLOSSARY PAGE 96 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 3 4 User defined time weighting RC This is the result of an RC type integration with A milliseconds time constant As the input level varies from X to Y and remains at Y the time constant is the time requested by the detector to reach 63 of the distance between X and Y For the user defined time weighting TC A milliseconds A defined by the user 16 4 Frequency weighting net
19. an zj value and the Leq v Active frequency band ER between cursors Leg between cursors Iv NR Choose the time base of Start Choose the portions of cE pare EPIIT the acoustical quantity to file for the displayed 16 46 10 000 08 17 1999 H plot End ue 200 d00h00m00s100 FF plot 16 16 28 800 08 11 1999 Lin fie eatiales TEE canes The following parameters may be defined Spectral channel The measurement channel to plot Select a measurement channel corresponding to a frequency band Time history channel s Select time channel s to plot The user can be used at the same time with the time history plot of the current band It is used to compare the time history for a frequency band selected on the spectrum history with the global time history There is the possibility to draw 6 time histories simultaneously or 5 if the current band has been chosen CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 35 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL E Start End Specify the beginning and end time to plot between The format of this selection is hh mm ss ms dd mm yy The icons HEE Le and 1 allows the user to respectively select the complete file that is noise data over the complete measurement duration the plot section in between cursors and go back to the previous selection Base plot step The plot may be displayed using the default time base of the acoustical quantities in the d
20. code and select the appropriate channels L ancel The command or Time history Next appearance can be used to find the next appearance of the same type of noise source on the time history plot Two possibilities may occur If a cursor is located on an existing noise event dBTRAIT32 then place the cursor at the start of the next appearance of the source If the cursor is not located on a noise event a dialog box is displayed for the operator to choose which type of noise source should be searched for More information on coding noise events in dBTRAIT32 can be found in chapter 6 CHAPTER 4 TIME HISTORY PLOT PAGE 33 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM The spectral time history plot is one of the main plots available in dBTRAIT32 It represents a plot of sound levels in dB per frequency band calculated according to a user defined time base as a function of time These sound levels are calculated for each octave or third octave frequency bands of the acquired spectrum from a SYMPHONIE or JAZZ acquisition system with the dBTRIG32 software For each frequency band we can therefore display a time history Such plot gives an overview of a noise climate for a given environment with frequency domain information The spectral time history plot may or may not display existing noise events In this case the noise sources will be displayed with different colours on the plot Au
21. duration of the source z Lmin Takt Maximal German version x Lmax These indicators are calculated for each noise sources selected in the list as well as for the remaining sources the sources that are not selected considered as a single source If the option Listed sources together is ticked the calculations will also be performed for all the sources selected in the list If the option Background noise is ticked the calculations will be performed for the rest of data The resulting table of results is displayed in a new window on validation by OK CHAPTER 8 TABLE OF RESULTS PAGE 59 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL ir Source Table PUSIGNAN S4TOLAS CMG SE Fie PUSIGNAN SATOLAS CMG Croix Pus Weighting Ay Data type Leg Start 07 1197 07 30 00 End 077117 11 00 00 Period 15m Background Pesan Usa T unn unes oot n 2 urn tnx nut toa T Ln ure Coun 7 11 97 07 30 00 a E q 077117 07 45 00 l l l l l B 07 11 97 08 00 00 l i i i b 77 11 97 08 15 00 l l l l l i l 14 77 11 97 08 30 00 l l l i i l 10 7 11 97 06 45 00 ij i i l 5 q 07 11 27 09 00 00 i g 07 11 27 09 15 00 4 12 7 071197 08 30 00 B i 07 1 2897 09 45 00 B 1 q 07 11 97 10 00 00 g 7 11 97 10 15 00 4 4 q 07 11 97 10 30 00 q 071157 10 45 00 Overall 6 21 2 408 i i i 125 com _ Cu The table of results features a toolbar with icons that allows the user
22. graphics for direct printing or export to standard office software to generate measurement reports Overall Leq and statistical indices over selected time periods Leq by noise source and occurrence Cumulative and probability distributions Peak Lmin Lmax Slow Fast Impulse SEL etc levels Loudest and quietest periods CHAPTER 1 INTRODUCTION TO DBTRAIT 32 PAGE 9 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Y Noise Source Identification Coding techniques available to classify noise events Automatic using threshold or time window conditions or manual coding Elimination of unwanted noise events during processing Listing of noise events present with Leq and SEL levels time of occurrence partial Leq etc Y Main Characteristics Run under the Windows environment display of many different windows quick access to the menu items using toolbar buttons multitasking with other applications Multi curve display with zoom in out autoscale etc On line help provided to guide the non specialised user v Optional Modules Automatic processing module of a set of measurement files with user defined scripts and automatic result printing Script server simultaneous frequency analysis and decimation of audio records during processing in dBTRAIT32 or at the time of acquisition in dBTRIG32 Y Standards and Regulations Options Occupational noise noise exposure sound exposure and OSHA indices The scheme below describes s
23. history plot Coding within known time limits Source menu A time condition is defined to code a noise source on a time portion of the data Coding using a threshold Source menu A threshold condition with or without an additional time condition is applied to identify data as a specific noise source Use these commands to define noise events and identify a portion of the data as a specific source A name and a code number designate a noise source 6 1 Advantages of coding The source identification commands are powerful tools of dBTRIG32 and dBTRAIT32 some elements are also available in the program for data transfer of sound level meters such as the SIP95 The source identification on line and or off line allows the user to define very precisely the time portions of the measurement where noise events appear When processing measurement results the source identification process allows the user to calculate noise indicators specific to a noise event and compare it to overall levels B Coding during acquisition on line In the dBTRIG32 acquisition software on line source identification is possible by pressing the function keys corresponding to the code number of the noise source F4 for source code number 4 etc or the related icon of the horizontal toolbar The source identification is enabled until the same code key is pressed or another noise source is enabled LL Consult dBTRIG32 user manual for further information o
24. holiday day Modify _ Delete With a weekly period the software can differentiate between weekdays periods for Add a new period example 8h 20h and weekend periods for example from Friday 18h to Monday 6h Weekly Daily Close 10 1 1 Daily 24 hour cycle This section describes the procedure to programme a 24 hour cycle Editing One Period Fa Editing One Period E4 Cycle Ahus Cycle 24hous ok pond Cancel Label day Cancel Label lay o ance Time slices Time slices Heal Add new Delete Start j z OK 05 00 00 Cancel End a 2400 00 A Give a name to the period for example day To accept the time slot click on Add Use the up down arrows to specify the exact start and end time Validate with OK The preceding window is re displayed with the current settings Other time slots may be added while existing entries may be modified or deleted using respectively the buttons Modify and Remove CHAPTER 10 DEFINITIONS OF STATUORY PERIODS PAGE 67 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 10 1 2 Weekly 7 day cycle In order to define a 7 day cycle proceed as follows Editing One Period Editing One Period E4 Delete Cycle Cycle C E Label working days Cancel Label 2 working days Cancel Time slices k Time slices n Hindit Monday 08 00 Monday 20 00 Modify E Tuesday 08 00 Tuesday 20 00 E Add new Wednesda 00
25. in percent including the comparison of level distribution of various noise sources dBTRAIT32 allows the amplitude distribution to be plotted with or without existing noise sources and the background noise on the same graph Use the command Display Amplitude distribution to plot the amplitude distribution of noise levels The following dialog box appears on screen Data type channel Amplitude Distribution EJ to take the noise eS v S N Select the types of data from Ee noise sources to orl a Voiture plot Mato Croix Pusi 20Hz Lin E Time portion to o Jace Define the dynamic range in dB of the X axis and the class m axis width of the a n OF A117 A199 H Hinde Mz E histogram n 30 zj 80 zj 00 23 OF 417 4199 5 consider Background noise I Auto Define the Class E dB maximum Y axis value in Y ass Cancel Iv ptmize In the field X axis it is possible to set automatically the dynamic range of the X axis corresponding to the noise levels distribution by ticking the Auto box The width of each class is defined in dB This value can vary from 0 1 dB to 20 dB in O 1dB steps It is sometimes interesting to compare the level distributions of the background noise and one of the main noise sources In the above example we will compare the amplitude distributions of data coded as Train to the Remaining Sources The resulting distribution plot is shown below Croix Pusi Leg Train Croix Pus
26. is given by the formula 1 j P tb i L eqpartial T sat Po Where Delta T sum is the cumulated duration of action of the considered noise source Pg is the reference sound pressure level 20 uPa P t is the instantaneous sound pressure of the sound signal It is also possible to relate the energy of the source to its own duration of action by calculating the particular LEQ 16 2 3 Sound Exposure Level Averaged energy of a discrete noise event of a source over the selected time period related to a 1 second time interval It is usually called SEL It is given by the formula h o SEL 10log f O at to t p et Where P t is the instantaneous sound pressure t gt ty is a stated time interval long enough to encompass all significant sound of a stated event Pg is the reference sound pressure level 20 pPa tg is the reference duration 1 s CHAPTER 16 GLOSSARY PAGE 95 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 2 4 Standard Deviation The standard deviation is given by the formula hea i Where n number of samples considered ej th sample mean value 16 3 Time weightings This is the result of an RC type integration with a specific time constant As the input level varies from X to Y and remains at Y the time constant is the time requested by the detector to reach 63 of the distance between X and Y Input level Level through detector 0 653 Y X 16 3 1
27. measurement channel for example or to recompose the elemental Leqs according to a greater time base CHAPTER 11 RESULT EXPLOITATION amp CUSTOMISATION PAGE 71 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 11 4 Customisation of dBTRAIT32 The software allows the user to customise various parameters for displaying the data The commands Preferences Colours Screen and Preferences Colours Printer allows the user to respectively set the colours of the different types of data displayed on screen or on the printer Select in this list the type of data for which you want to modify the colour The actual colour associated to this type of data is displayed below the list Then select with the mouse the new colour For the printer colours the user can also select the type of line used for printing a noise quantity compressor ferwik Presses Remaining sources Background Colour Font style arial Regular 10 8 Anal Alternative E 44 AP Arial Alternative Symbe F Arial Black 11 Arial Marrow 12 Anal Rounded MT Bal 14 TT Aurora BdCn BT zl zl Sample AaBb yr Script Westem compressor ferik Presses Average spectrum The command Preferences Font allows the user to choose which computer font will be used to display text in dBTRAIT32 Select the font type style regular Italic Bold etc and size in this dialog box Click on OK when all the modifications have been carried out
28. on screen UserWgt 3 1100 Eu For example consider constant weighting of 11 dB between 500 and 2000 Hz The 0 1100 corresponding dBTRAIT INI section will be written as follows 1 1100 2 1100 3 1100 The user weighting option menu position or icon will not be accessible in the programme if the UserWgt section is not found or empty The indices that are not a multiple of 3 are only valid for one third octave spectra 5 5 Listing spectra values between cursors With the command iiil Graph list spectra it is possible to list the values of the averaged minimum and maximum spectra in a listing table or as graphics For further information on this type of listing see the paragraphs 8 1 and 8 3 CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 40 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 5 6 Coding a noise source Graph menu It is possible to identify noise events by coding data on the time history plot by using the command or Graph Source between cursors To do so place the cursors on a time portion of the plot then click on the icon m The following dialog box appears on screen There are two possibilities The noise data to code corresponds to a new noise source not yet defined in the software Tick the box New and give a name and a code number to the source Source Identification Fd Coding domain T Source 2 fenmik qM compressor 2 Code F ex Cade 3 Moes 000 gs Start s EY
29. report Use the commands File Print and the commands of the Edit menu to respectively print a time history plot or a table of results and to export the results into word and spreadsheet processors for further calculations and presentation See paragraph 11 BH Step 7 Save the measurement session datafiles Use the command File Save to save any modification made to the current datafile Thus command also concatenate any binary file BID that contain for example an audio signal into the current measurement session file CMG See paragraphs 3 1 7 and 3 1 11 CHAPTER 2 DATA PROCESSING IN DBTRAIT32 PAGE 14 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 DATAFILE MANAGEMENT IN DBTRAIT32 3 1 CMG datafile management environmental acoustics A measurement session data file with the CMG extension may represent several megabytes of data and dBTRAIT32 may work simultaneously on several data files 3 1 1 Open a CMG datafile To open a CMG measurement session file stored on the computer hard disk click on the icon or use the command File Open The following dialog box appears on screen Select a measurement session file in the list files with extension Ae test 381115 O94450 CMG demo_981118_103444 CMG e test 381115 D34743 L MG E EE Ur DESI GIN sub directory where CMG a fast_981113_160439 CMG fa test 981115 D94854 CMG M test 981115 D94019 CMG f test 981115 D95038 MG diu files are ix test 38111
30. results in the frequency bands spectrum data Activate or not the automatic window resizing operation when the contents have changed Data display of listed spectra is dealt with in paragraph 8 3 8 2 2 Levels of defined noise sources per periods Use the command Display Sources per periods to calculate noise indicators of the defined noise sources over a portion or the complete measurement datafile for user defined time periods The following dialog box appears on screen Sources Levels by Periods Channel Sources Select the datafile Channel Type wot Train al ig Em x Pu A V alture i menis E py Ns zm Peak Lir E Moto a eee eno calculations will be aia Chien aboiement sources to consider made Crom Pusi 20Hz Lin m MU NP rom Pusi 25Hz Lin Crom Pus 31 5Hz Lin v Listed sources together Crom Pusi 40Hz Lin E E Bemanng sources Select the time v Background noise portion of the data Stark file to consider 07 41 01 07 11 1997 g Items End Iv Leg Select the noise 10 59 59 0709141997 E E Partial Leq indicators to calculate SEL Select the time A FIM period for the Period himin j w calculations 00 15 00 g I Lmax Iv Count of appearences x Cancel Taki kanma asd L5s The software may calculate the following indicators for each period z Particular Leq m Number of appearances of the source z Partial Leq of the file containing the code 7 SEL Cumulated
31. the user to plot all sources that have not been selected except the background noise as a single source named remaining sources This option may be useful to estimate the contribution of a source compared to all the other sources for instance The selection will be recalled as default value next time such a command is used This option is not active when no source is identified or when all the sources have been selected in the list The option Background noise allows the user to represent all the noise data in the file that have not been coded as a specific noise source called background noise The selection will be recalled as default value next time such a command is used When more than one channel are selected for the plot the identified noise sources cannot be displayed on it Dynamic range Select the minimum and maximum values of the Y axis in dB for the plot On validation these parameters will be applied to the plot To automatically adjust these values tick the box Auto Leq between cursors This option allows the user to calculate the equivalent sound pressure level corresponding to the time portion in between the cursors of the time history plot This value is displayed on the time history plot If this option is not ticked the value in dB of the considered acoustical quantity is given for the cursor position CHAPTER 4 TIME HISTORY PLOT PAGE 26 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 2 Time history plot disp
32. to the 32 Bits forma automatically in g M 270688 on order to integrate them in the global CMG measurement 60699 cr 220699 crm 200699 crm Cog90604 3 o 9 cmg 290699 cm i C0590605 iade amp DE89 cma F 240693 cmg 300699 ema CoSS0B06 TED Validating this dialogue box creates a new measurement session in dBTRAIT32 that groups together all measurements This new measurement session file groups together all the records on the same channel if the records to concatenate do not overlap temporally the records to concatenate have the same integration time i g Leq 1s m the records to concatenate have the same measurement location Otherwise the global measurement session displays the different records on parallel measurement channels The names of all chosen files are displayed on the Name line The length of this line is limited to 4096 characters This length can be insufficient for treatments of monitoring files where the number of files to take is high Add the following line in the section Settings of the file dBTRAIT INI in order to increase the size of the input line Settings MultFileBufSize 16384 The number 16384 is an example CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 20 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 2 Document dependencies in a CMG file dBTRAIT32 allows the user to work in different measurement session files at the same time For each file several windows may be di
33. well as all binary files attached to them BID A dialog box appears on screen Select the measurement session to delete and click on the OK key 3 1 6 Close a CMG datafile To close a measurement session file of type CMG use the command File Close Closing down the information window of the datafile will also result in closing the CMG datafile All others windows results listings time history plots etc will be closed as well dBTRAIT32 will also prompt the user to save this CMG datafile if any modifications have been made to it before closing 3 1 7 Save a CMG datafile Unlike the 16 bit version of the software modifications made to a datafile in dBTRAIT32 are not saved dynamically It is therefore required to use the command File Save or File Save As to save the measurement session on the computer hard disk 3 1 8 Edit the CMG datafile header It is possible to modify the header of CMG datafiles by using the commands Edit File Header General parameters and Channels File Header Modification it The dialog box File Header Modification allows the user to modify the demo measurement session zm following general parameters Hl The start date and time of the datafile File Start M The measurement session title 16 04 38 000 13 11 1338 A aea The dialog box Channel Header Modification allows the user to modify the following parameters Modification of the location of a measurement channe
34. 1 48th octaves option Decimation or deletion of audio records to optimise audio storage capacity on the PC hard disk Multispectrum analysis of audio records spectrum time history and A Lin overall levels option Detailed time history A C and Lin in parallel several time constants Fast Slow Impulse etc using very small time step option You can then evaluate tagged noise data using dBTRAIT32 which permits detailed analysis of the noise climate in both time and frequency domains All these analyses are available through an operation script server common to all 32 bit O1dB application software packages The definition and configuration of such analyses can be accessed through the command Aux Frequency analysis amp advanced processing Configure in dBTRAIT32 and Audio Analysis Configure analysis key scripts edition in dBTRIG32 The dialog box shown above is displayed on screen The user then defines an analysis script that consists of a list of processings that will be applied to each audio event For each type of processing defined also as an operator the user sets various parameters This utility saves time as you will not have to process the audio recordings manually any more Furthermore the multispectrum analysis is ideal for tonal components which vary in frequency and level If the option cannot be accessed it means that the CMG datafile does not contain any audio recordings On validation of
35. 10 Croix Pusi s d TRES EP NEN S zit a dialog box is displayed allowing the user to choose the audio Sf 07 49 27 s VALLE LE dius record to play back After selection click on Play to listen to it on 07 11 87 07 55 03 10s Croix Pusi ll Ax t ho M co ce e e 07 11 97 07 57 26 10s Croix Pusi 12800 0 the com uter SOU nd S stem 07 11 37 08 06 45 10s Croix Pusi 12800 0 p y 07 11 97 08 07 00 10s Croix Pusi 12800 0 Iv Individual channels Close The option Individual channels allows the user to playback dual channel audio signals separately channel 1 and channel 2 are identified in the list If this box is not ticked the channels of the audio signal will be played on each way of the loudspeaker 5 4 Operations on the spectral time history Graph menu From the spectral time history plot window several calculation and display operations can be performed 5 4 1 Interactions between spectrum and time history plot When moving the cursor on the instantaneous spectrum plot upper part of the window the time history of the corresponding frequency band is automatically displayed in the lower part of the window if the option Plot active frequency band has been selected in the display parameters When moving a cursor on the time history of a frequency band lower part of the window the instantaneous spectrum is shown for this cursor position 5 4 2 Maximum minimum and averaged spectra With the ic
36. 1dB by using the command Aux Audio Export in WAV file format The following dialog box is displayed on screen In the list of audio records attached to the measurement session select one or more audio records to export Export au format WAY In order to identify the audio records to export different 2800 information are available date time duration location m sampling frequency Vas Once the audio records have been selected click on the i 1 Pusi 1 2 Crom Pusi 1 2000 Crom Pusi 1 1 1 07 11 97 08 06 45 10s Crois Pusi ET Export key 07 11 97 08 0700 10s Croix Pusi 12800 07 107 dncodn1c Ans Crem Pha 1 12000 ri The individual channels option allows the user to export dual channel audio records into two single channel WAV files Ii Viole ger vule Femer The software then displays a dialog box in which the user gives a generic filename for exporting the audio records Select a directory on the hard disk and enter a filename then click on the Open button dBTrait A warning message is then displayed to give the The First export File name will be D iyversion32yGBidemo001 way Bo you want Eo continue complete filename of the first audio record to export If this name is acceptable click on the Yes button The following records to export are then incremented For example the first record could be named DEMO001 WAV while the fourth exported recorded will be named DEMO004 WAV The WAV files m
37. 23 OF 17 41997 g W Dose Cutoff level dB jes Criterion level dB 30 Channel Sources Iw S N Channel Type Jwa MER Maj a ex Crois Pusi Leq 4 NI Mato e E jus D Doa barking Hepresentativiby h min s gp acq E Plane fos 00 00 A Peak channel Clin sas TES Crois Pusi Peak Lin B time limits v Overall Leg Remening sources Channel Select one measurement channel between those available to calculate for Peak channel Select here the peak channel to be scanned for Peak related indicators The list of existing peak channels for the current file is displayed Its identifier identifies each channel corresponding to a certain type of data stored during measurement When only one peak channel is present this field is disabled and the peak channel is displayed and selected by default Hour and time start end To calculate on only a portion of the file uncheck the Complete file option and select the period When ticked the Complete file option ignores the settings in Start and End and calculates the parameters on the complete file Representativity hh mm ss Define here the duration to take into account as the representative duration for the computation Let us consider a measurement between 10 00am and 10 15am fifteen minutes only The factory operation measured lasts 4 hours per day same level The representativity of the measurement done is then 4 hours Select 8 hours if you have measure
38. 32 environment For example the listing Leg by statutory periods can lead to an error if the periods concerned have been erased between the moment of the script definition and the moment of analysis CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 78 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 6 Errors and warnings Information concerning errors operation impossible and warnings operation done with modified parameters appear in the info rubric of the summary window at the end of the processing They also appear in the confirmation dialogue box after each operation in the case of screen simulation The errors are marked as ERR and the warnings as Y The list of errors and warnings are shown below Message Operation OK Type OK No comments Message Not Enough Memory Type ERR Fatal error Close any application not necessary or define the script with fewer operations Message Error access destination file Type ERR The disk is full or protected Erase files not necessary change the disk or remove the protection Message Incorrect Parameters Type ERR The script cannot load the parameters of the current operation Define the script again Check that the file has not been modified to avoid the same problem in the future Message Unknown Operation Type ERR The script continues with an operation that is not recognised by dBTRAIT32 There are two possible reasons the operation in question is not available in your configur
39. 5 n34055 CMG i E test_987116_094145 CMG Name of the selected measurement pe Fil dema 981117 181137 CMG Oen session file a diis Files of type o dB Measurement File CMG DON Inf ti f Eae ed I Details Detailed information on General Size bytes 518199 the selected CMG files information on Start 17 11 98 18 11 37 number of audio the selected CMG End 17 11 88 18 33 28 records noise file Autospectr 4 quantities codes etc Created 19 11 98 13 55 33 Saved 13 11 38 13 55 32 Version 1 001 Items g Audio Leq 1 Range 1 The upper part of this dialog box allows the user to select a measurement session file CMG for processing in dBTRAIT32 by choosing the appropriate location on the hard disk The lower part of this dialog box is activated when a CMG file has been selected in the list Various information on the datafile are given such as E The date and time the file has been first recorded and when it was last saved the version and the number of items contained in the CMG file By ticking the details box the size in bytes of the datafile the start and end dates of the measurements the number of events audios spectrums etc as well as general parameters dynamic range number of codes etc Once a file has been selected click on the Open button to open the datafile and proceed with its analysis CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 15 DBTRAIT32 SOFTWARE PACKA
40. 630 B50 659 674 689 690 693 06 11 1994 63 3 537 708 546 573 580 609 669 671 674 09 11 1994 56 6 555 651 556 563 569 561 599 601 604 10 11994 557 522 676 525 526 529 539 580 5822 586 11 41 8984 755 522 944 525 536 542 556 575 57 7 581 14111994 56 2 45 6 522 490 514 522 55 56 50 3 56 5 588 The table of results features a toolbar with icons that allows the user to modify the calculations parameters for example The icons of listing window toolbar allows the user to perform the following operations Change the listing parameters Activate or not automatic window resizing operation when the contents have changed 8 1 4 Loudest and quietest periods Use the command Display Loudest period to calculate the loudest and or quietest time period of the measurement datafile The following dialog box appears on screen Loudest Period Select the datafile channel for which Select the noise calculations will be v Loudest period indicators to e v Standard deviation Channel Crom Puzi Crom Pusi 25Hz Lin v Compare to a percentile Crom Pus 31 5Hz Lin Crom Pusi 40Hz Lin Ref L 35 0 Select the time portion of the Select the period Period himin and time step for data file to AJ ET the calculation pa 07 41 01 07 11 1387 A 00 30 00 g nd Step 11 00 23 07 11 1387 g 00 07 00 a HHJ DAM K Cancel In the fields
41. 9 991 717 1 3 Oct 20Hz Lin 500 422 805 482 hayfield road hayfield road hayfield road hayfield road hayfield road hayfield road hayfield road 1 3 Oct 25Hz Lin 60 2 43 4 796 496 1 3 Oct 31 5Hz Lin 503 445 765 508 1 3 Oct 40Hz Lin 596 442 794 502 1 3 Oct 50Hz Lin 596 453 766 50 1 3 Oct 63Hz Lin 60 4 453 766 518 1 3 Oct 80Hz Lin 59 5 446 822 506 hayfield road 1 3 Oct hir P riode la plus bruyante i OF Xx hayfield road 1 3 Oct hayfield road 1 3 Oct E hayfield road 1 3 Oct JAN SATOLAS CMG hayfield road 1 3 Oct hayfield road Pond ration Type de donn es Leg D but 07 11 97 07 28 18 07 11 97 11 10 08 D but Fin Niveau hayfield road Leq Aircraft hayfield road Leg R siduel 07 11 97 10 21 18 07 11 97 10 51 18 P Fichier FA REIHE 00 00 01 E FF ey El ee L 1 hayfield road Leq A JAN SATOLAS CMG E S n c l _ _ Diu LV PV NM Llz Page 1 Sec 1 1n At 14 1cm Ln 5 Col 2 REG TRE EXT 7 CHAPTER 11 RESULT EXPLOITATION amp CUSTOMISATION PAGE 70 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 11 3 Principle of the copy paste operation of a time history plot The configuration dialog box for copying time history plots command Edit Copy when the active window is a time history plot
42. 98 Time basis Cms we ws Vi Vx Voi Leq A 30 8 Peak Slow Fast L90 0 Leq Multispectra 1 3 Oct RC Leq Peak Slow Fast L90 0 Leq Multispectra 1 3 Oct RC hJ NNNNN Source parole camion voiture 01dB zz 9 METRAVIB technologies USER MANUAL fie D 01 dB 2 A METRAVIB technologies Copyright O dBTRAIT32 Environmental Noise Data Processing Software Package 01dB Italia s r l Via Antoniana 278 35011 Campodarsego ITALY 39 049 92 00 966 39 049 92 01 239 User Manual infogb 01dB com 9 www 01dB com 01dB Head Office 200 chemin des Ormeaux F 69578 Limonest FRANCE 33 4 72 52 48 00 amp 33 472 52 47 47 O1dB Inc O1dB do Brasil 31 Jordan Street Rua Domingos de Morais 2102 P O Box 796 Sala 11 1 Andar Vila Mariana Skaneateles NY 13152 04036 000 Sao Paulo USA BRAZIL 1 315 685 3141 1315 685 3194 55 11 5579 6460 55 11 5579 6610 The specifications are subject to change without notice SYMPHONIE Q is a registered trademark of 01dB MICROSOFT is a registered trademark Microsoft Corporation 01dB Asia Pacific No 9 Jalan USJ10 1D 47620 Petaling Jaya Selangor MALAYSIA 60 3 563 22 633 60 3 563 18 633 Windows 98 Windows 2000 NT and XP are trademarks of Microsoft Corporation P83MAN41 03 NOT1105 gb dBTRAIT32 4 0 manual 03 doc Updated Augu
43. AVE bands a a ase sace Rasse atas ouibus Data tela Ate d dina acai poder aha area esee ecc Le adu ed pf 99 16 5 2 Octave and third octave standardised bandwidth and centre frequencies ssssse 99 17 PIPE ND oaaae MM DC RUNE 101 17 1 EDITING THE SOFTWARE LICENCE NUMBER yi eezes tpi te vd cee IRE a Re Mte A Eoo ee OSSEE AKSA O Ee eee ER dove MO deve vt p den 101 TABLE OF CONTENTS PAGE 7 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 1 INTRODUCTION TO DBTRAIT32 1 1 Overview The software package dBTRAIT32 has been developed for the treatment of environmental noise measurement data It represents 10 years of expertise and development The software is based on the short LEQ theory developed by P LUQUET former member of the French Laboratoire National d Essais and head of O1dB since 1987 dBTRAIT32 is compatible with all O1dB acquisition units such as SYMPHONIE or JAZZ sound level meters such as SIP95 noise dosimeters such as SIE95 and hand held analysers such as SVAN912 Standardised results such as time history of a given acoustical quantity Leq and statistical index Ly values over selectable periods etc are available but the real advantages of dBTRAIT32 start where those of most dedicated instruments end time history of a selected spectrum frequency band and associated statistical calculations playback of audio recordings from within the data plot frequency analysis identification and evaluation of noise
44. CMG ALPHA TATO T01 the amplitude distribution of the TATO CMG file The result filenames are in this case independent of the script filename If the agglomerate listings option is chosen the program creates a file by listing operation with a unique name depending on the type of operation Leq and Ln LEVELS Sources LSOURCES Leq and Ln per period LEVELPER Sources per period SOURCEPER Statutory periods USERPER Loudest period LOUDEST Count COUNT Occupational noise WORKPLAC The extension is 000 for the first operation of a given type in the script 001 for the second one etc For example the grouped listing of the type Leg and statistical indices of a CMG file assembly in the C 01DB CMG index treated by the script ALPHA FAS will be placed in the file C O1DB CMG ALPHA LEVELS 000 If the script contains a second listing of this type with different indices for example the results of the operation will be found in the file C O01DB CMG ALPHA LEVELS 001 The names of the result files are in this case independent of the names of the acoustic data files As it has been mentioned earlier no grouping of graphics files is possible Important The files are sorted chronologically if the agglomerate listings option is chosen to allow for an easier exploitation of results If the Individual listings option is chosen the names of the result files obey the same procedure as for graphical result files a listing file b
45. DVCSSUPC LEVEL LESELE E EEA E E A E E A N 93 L0 2 FEguivdleni sound pressure T6 Vel Leg ecce a a E E E E E indu la iride udns 93 lO X FEOT ON CD a easi E E R N E tai Oat ie 94 losas Fercentiles ans Neal ME O asis na E E O E E E E aM Ut 94 DIOS AMIN OAE A E A E E E E R E O OA eee E Te 94 LOO LMAN ROREM 94 16 2 ACOUSTICAL QUANTITIES RELATIVE TO NOISE SOURCES nosioca i a a i aeai 95 LOI de PInncWlaPde0 sx uictus tasses bui esca E E E E DE 95 Mea FAL c 95 16 2 3 SOUNA TEX POSUT CS LOVE Doct sc E A a a a a a N tena 95 16 2 4 Sandara DEV Al OTa E E A E A A E A EE A E A Ka A 96 16 3 TIME WEIOHTIN S Era E EEE I tM een E O N ATE E OE 96 FOl SLON MEWAC RUNS AA EATE AE E E ET siot E E O E OT tet 96 toas 2A AST TDHCOWOISIIO EEA a E E aces a a s buda ccc adus E cta dass 96 lO IMPULSE ame WELT Ne Lise a treatise Mone E be E E R R a a etel tai icta 96 16 3 4 Userdcfined tine waiohtine RG sis asses A A A AR A se ah A eu ME 97 16 4 FREQUENCY WEIGHTING NETWORK S 52 552 d iei lec A nre CE Ere etu ep ci quu A a codd A R E E ia c RP M E 97 16 4 1 Comparative curves of the usual Weighting Networks eese nns 97 16 4 2 Correction table of the Weighting Networks versus frequency sesenta 98 16 4 3 Transfer function of the corresponding filters ccccc cccccsccecaietaetecnsacndonvsnnacennsncedeosasnacennsasadeossenastdasacedeenacnecneasenedenst 98 16 5 OPECTRA GL mc oque deir M D M I ML M M M ME MM IT S 98 16 5 1 OCTAVE amb TIE OCT
46. E E EN O AEE E EE 53 8 1 LISTING OF OVERALL ACOUSTICAL QUAN TIVIES enseri eeni a E E N EA EA NE 53 8 1 1 DET RTT TE TADS 0072 GL TT n 53 8 1 2 75777 82117 M 2112 28217 41 15 NN ERUNT 54 8 1 3 Leq and statistical indices by statutory periods sese eene nnns 55 8 1 4 Loudest ONG GUICLEST DOFIOUS AAEN titi ate aia ict et deca eie c obe eo dered etel ete Lectt ed 56 8 2 LISTING OF NOISE SOURCES ACOUSTICAL QUANTITIES dre tice esed ive pend eden eg eoe one sepe oae era Mirae e edu eee eo PONO 58 8 2 I Levels of desjined noise sources Overal dace aceite acetate puse v dy eve La ite bint cts de ed e Le hag 58 8 2 2 Levels of defined noise sources per periods 5i oca ciet eiae ts caen pi evt e d via Re DV vU REY s T od Vu Eie d pRE Ne UM LA A Ud LUE 59 8 2 3 COUNTS SOUL COS acu aeneo E net Oty A E a A EN 61 8 3 DISPESY LISTED SPECTRA AS GRAPHICS 2ze sedan i E E EE cesar tle leet IM aL NC IM LM M scd dM es 62 9 OCCUPATIONAL NOISE OPTION oiris ees ERI e PeR EUN EE IE YNERe NN a URN ENSE FRE NAE eA NR EQUES PEERS TWEEN SS E RAQE WERE ONES FER PRSE SER STR A 63 10 DEEFINIFIONS OESTATUOR Y PERIODS ees bersese aav qe enne PERS eave aE EEE EREE EEE E E UE YE VR 67 tUs Day 24doUr OVE O ou oo it Ea i t eiut a eiua V Mo UM I ME 67 TOUT 2 Week day CUClO Seele Qt CRN i o in ev ues sitis d leu A are ee en er ead 66 11 RESULT EXPLOITATION amp CUSTOMISA TIQN ereeeee eae envoi eod o ERN Fa ane E URET ENEERE S EN EN LN S Se x
47. G BAL8 CMG BAL1 CMG 04 11 94 07 00 00 05 11 94 07 00 00 06 11 94 07 00 00 07 11 94 07 00 00 08 11 94 07 00 00 09 11 94 07 00 00 10 11 94 07 00 00 03 11 94 07 00 00 05 11 94 07 00 00 06 11 94 07 00 00 07 11 94 07 00 00 08 11 94 07 00 00 09 11 94 07 00 00 10 11 94 07 00 00 11 11 94 07 00 00 04 11 94 07 00 00 PrPrrrrrrrp We talked about the format of results sent to the agglomerate file The listing of type Leq and statistical indices benefits from a complimentary privilege the agglomerate listing is presented entirely formatted on the screen independently of the choice of exit destination In other words even after a simulation on the screen the results of this type are displayed data as for preceding example ES Summary Overall Leg and Ln Table E Fi Sta Zr Ferre ge T6 toe Tiris Tae Ts Tus Tuo Tu Tuo Tus Tu BALS CMG 11 11 94 07 00 00 1277184 07 00 00 Leq 513 55 0 of 6 577 50 1 BALTU CMG 12 11 94 07 00 00 13 1 94 07 00 00 leq A 58 466 69 aa 49 52 ES 56 3 61 3 628 652 BALA CMG 041144 07 00 00 05 1194 07 00 00 Leg A 596 482 703 485 507 560 593 615 61 B2 1 BAL3 CMG 05 11 84 07 00 00 06 11 54 07 00 00 leq amp 574 466 703 4660 466 492 576 597 600 BEDA BALA CMG 05 11 94 07 00 00 0771134 07 00 00 leg A 636 548 735 556 575 502 61 4 666 668 67 BAL CMG 0771144 07 00 00 08 114 D7 00 00 leg A 676 625 725 B32
48. GE USER MANUAL 3 1 2 Information window of a CMG file Once a CMG datafile is opened the following window is displayed on screen Start and end time amp date of the measurements integration time of the acoustical quantities total number of measurement periods EB fast_981113_160439 CMG Miil x FAST 9881113 150438 CMG demo measurement session 15 04 38 000 vendredi 13 novembre 1988 16 05 28 640 vendredi 13 novemhre 1998 Identifier of each Ome measurement Type of data frequency channel in the Total nb of periods 2482 weightings and minimum CMG file Wit Mla and maximum levels for Wot Min Chana Len A 4D gn each measurement channel rounded at the nearest Channel 1 slow Inst A 40 at integer number Channel 1 Slow A 40 o Channel 1 Fast Inst A 40 ar Channel 1 Fast A 40 ar Ear 5 truck B plane g Existing noise sources with their corresponding priority code are displayed The noise events may have been coded at the time of acquisition or in a previous dBTRAIT session The beginning and end times that are given in this window correspond to the acquisition date and time references They cannot be modified during processing The field Channel lists the noise quantities per physical measurement channel in the example above there is one measurement channel for which there are 5 noise quantities overall A weighted Leq A weighted time constants Slow Inst Slow Fast Inst and Fast levels For each ch
49. GE USER MANUAL 8 2 Listing of noise sources acoustical quantities The following functions allow the user to calculate noise indicators taking into account noise sources 8 2 1 Levels of defined noise sources overall Use the command Display Sources to calculate noise indicators of the defined noise sources over a portion or the complete measurement datafile The following dialog box appears on screen Overall Source Table Channels 2 33 Sources P weighted p i A E Select the datafile Mu 3 Select the noise channels for which Cree seems Z sources to consider calculations will be mM made Cwis Pusi Listed sources together Croix Pusi 40Hz Lin E Background noise Select the time Start Overall Leg portion of the data 07 41 01 07 11 1997 g eee Items i i End A Lic UE OF 171337 H pee Me pd Nm Partial Leg indicators to calculate SEL Iv Lmin Iw Lmas Count e x v Cumulated duration SES EX akt hanmal t Lasse pg The software may calculate the following indicators Particular Leq m Number of appearances of the source m Partial Leq m of the file containing the code SEL Cumulated duration of the source n Lmin Takt Maximal German version Lmax These indicators are calculated for each noise sources selected in the list as well as for the remaining sources the sources that are not selected considered as a single source If the option Listed sources together is ticke
50. Hew k 10 54 30 000 20 04 1998 A mei eue compressor 2 Ps 11 46 50 000 20 04 1388 H B L ancel The noise data to code corresponds to an existing noise source already defined in the software Uncheck the box New and select in the source list a source type Coding domain Source Jferwuik compressor Code 7 Code 3 Jes wf Start 2 iem i 10 54 30 000 2 04 1338 E hame compressor 2 b End Gade 10 1 1 46 50 000 2004 1998 E 5 aer Noise source coding can be applied to one or several measurement channels In the field Channel s to code select the appropriate channels More information on coding noise events in dBTRAIT32 can be found in chapter 6 CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 41 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 IDENTIFICATION OF NOISE SOURCES dBTRAIT32 can be used to identify sources in order to calculate their contribution to the overall noise level and to perform analysis according to various regulations The identification process is achieved by coding techniques specific to the software On top of coding at the acquisition stage dBTRAIT32 features three different type of coding techniques B Coding using cursors from a time history plot A time condition is used to code a source on a time portion of the data This command is activated only for time history plot display The time section to code is the one in between the cursors on the time
51. If possible On validation of this dialog box the following table of results is displayed on screen in another window Complete Count PUSIGNAN SATOLAS CHG IT x Ex PUSIGNAN SATOLAS CMG Source Train Location Croix Pusi Weighting A Data type Leq Start 0771197 07 31 01 End 07 11 97 11 00 23 Time Lmax SEL 0771197 08 19 45 7 11 97 08 19 54 63 1 0771137 08 20 19 7 11 97 08 20 23 58 2 7 11 97 D8 38 44 77 11 97 08 38 48 64 0 7 11 97 D8 41 28 7 11 97 08 41 28 58 3 H7 7 11 97 08 41 36 7 11 97 08 41 36 48 3 H7 7 11 97 D8 44 01 77 11 97 08 44 05 B5 5 0771107 09 50 59 0771197 08 51 18 58 5 0771107 09 58 29 11 97 09 58 32 57 0 0771137 10 11 49 0771197 10 12 26 650 0771197 10 19 54 7 11 97 10 19 54 71 2 0771107 10 28 48 77 11 97 10 29 50 64 0 0771107 10 30 13 0771197 10 30 17 58 8 Total 12 The counting operation allows the user to obtain the following results for each source s appearance Time and date of the appearance Duration of each source appearance Particular Leq Lmax time of appearance of Lmax and SEL for each source appearance Total number of appearances for each type of source Total duration for each type of source Overall Leq Lmax and SEL for each type of source CHAPTER 8 TABLE OF RESULTS PAGE 61 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 8 3 Display listed spectra as graphics When calculating overall acoustical quantities see
52. SOFTWARE PACKAGE USER MANUAL Example Consider a time portion of a source appearance code 8 that the user wishes to assign to another source It will only be possible if the current source code number is lower less than 8 In this case the previous source appearance will be split into 2 noise events separated by the new source appearance Otherwise code greater than 8 the previous source appearance will remain unchanged source appearance code number 10 nurre appearance code number 5 Background noise code number 15 Identification zone Identification lj Identification lj Identification ij code number 3 code number 8 code number 12 The example above shows the importance of the source code number when identifying a noise source Depending upon the source code number the result of identification may change and lead to different calculation results At the time of processing when deleting a noise source all data attached to the current source are assigned to the background noise as it is not possible to restore the previous source identification Therefore we recommend being very careful when coding sources as this operation is irreversible The priority rule is not respected when the operator re code part of the data with the source background code 15 In this case only existing codes will be deleted and overwritten With dBTRIG32 expert module it is possible to code simultaneously noise d
53. Wednesday 20 00 Add new a Thursday 08 00 Thursda eu O DEEN Fridau 08 00 Friday 2u 00 Time Limits ES Start gg p8 00 00 m nd Carcel i Monday 20 00 00 8 For example a period named working days has a 7day cycle with time slots set between 8 a m and 8 p m from Monday to Friday inclusive Add the first time slot Monday between 8 hrs and 20 hrs Access the list of days and increment the time using the arrows adjacent to the boxes Validate then repeat this operation for the other days until Friday The Period Edition window contains 5 hour slots corresponding to the 5 days of the week Pernods da The list of periods is also adjusted Close the dialogue box in order to close the operation The periods are saved by default and are resumed at the next use of the programme Delete E Note that an overlap of two time slots is not possible and that from a calculation point of view two time slots that are concurrent will be considered as one slot Add a new perad weekly Daily Close CHAPTER 10 DEFINITIONS OF STATUORY PERIODS PAGE 68 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 11 RESULT EXPLOITATION amp CUSTOMISATION It is possible in dBTRAIT32 to print directly a time history plot and or a result listing and to export the results as graphics or values in standard office spreadsheet and word processor software for further processing and result presentation The user
54. a new noise source not yet defined in the software Tick the box New and give a name and a code number to the source Source Identification Ea Toute Coding domain Measurement channels to code a Dog barking gH o Ej Definition of a new Definition of the start and end date and time em ar type of Fils automatic when using E als eds ee an coding between cursors 07 4 BUM E code number End 11 00 23 0771171997 a The noise data to code corresponds to an existing noise source already defined in the software Uncheck the box New and select in the source list a source type Source Identification Ea Source Select an existing noise source type in the list Coding damain Dog barking E Background noise l Start 07 41 01 0771171997 A End 07 42 23 0771171997 g New Hame rew source bode q Carce Noise source coding can be applied to one or several measurement channels In the field Channel s to code select the appropriate channels CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 47 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 3 3 Identifying using threshold condition Source menu Use the command Source Identifying using threshold condition to define the parameters of the source identification process using a threshold condition To illustrate threshold coding let consider the example of a car A minimum threshold of 60 dB a ma
55. annel the data type Leq Peak Slow Fast Impulse multispectrum etc the frequency weightings A B C Lin etc and the minimum and maximum values in dB are given 3B E An information window or its icon d monstrati Ifa E3 when minimised is displayed for each opened CMG datafile Closing down this window will close the datafile 3 1 3 Main toolbar for CMG files The main horizontal toolbar allows the user to access the following dBTRAIT32 functions Main 16 04 39 000 13 11 96 Active data flow M ul Open an existing CMG datafile Ep Copy the active window Print the active window edi Perform analysis of audio records Display an existing averaged spectrum Plot a time history Plot a spectral time history Personalise the screen curves colours Playback of audio records glo iB On line help index Most of these functions will be described in this manual CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT32 PAGE 16 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 1 4 Add another measurement session to a CMG datafile Another measurement session may be added to the active CMG datafile by using the command File Add session The software asks the user to select a measurement session to add to the current datafile Select the appropriate CMG file in the list and click on the OK key 3 1 5 Delete a CMG datafile Use the command File Delete session s to remove one or several measurement session files as
56. asurement session with extension CMG CHAPTER 2 DATA PROCESSING IN DBTRAIT32 PAGE 13 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 2 2 Analysis process The analysis principle of acoustical quantities in the dBTRAIT32 software package is very simple In this paragraph we present a typical procedure for noise data processing Most of the following points are optional either because you will not be able to access to that particular function either because such analysis is not required E Step 1 Open one several CMG datafile s Once the dBTRAIT32 software is launched use the command File Open to open a CMG measurement session file that is stored on the computer hard disk Several CMG datafiles may be joined together to create a single measurement file Use the command File Add session See paragraph 3 1 4 E Step 2 GRAPHICS Display of a noise quantity time history or a statistical distribution Once a CMG datafile is opened the analysis process may be started for example with a time history display of any acoustical quantity contained in the measurement file command Display Time history See paragraph 4 With the Symphonie PC based measurement system or the SIP95 real time simultaneous acquisition of octave or third octave spectra is possible To display the time history of a given frequency band use the command Display Spectral time history See paragraph 5 A probability distribution of the noise levels may be displayed w
57. ata In this case the priority rule is still valid but the data coded with a higher code number will be overwritten If for example the data that lies within the identification zone in the above example are coded with the numbers 10 and 5 simultaneously and that the user delete the code 5 the noise data will still be coded with the code 10 CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 46 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 3 Coding commands in dBTRAIT32 Let us now describe each coding commands of dBTRAIT32 6 3 1 Source between cursors Graph or Time history menus It is possible to identify noise events by coding data on a time history plot by using the command or Time history Source between cursors and Graph Source between cursors for a spectral time history plot The command or Time history Next appearance can be used to find the next appearance of the same type of noise source on the time history plot For further information on coding sources from a plot consult the paragraphs 4 7 and 5 6 6 3 2 Identifying using time condition Source menu Use the command Source Identifying using time condition to define the parameters of the source identification process using a time condition The only difference with the source between cursors command is that the time parameters start and end are not defined by the cursors position on the plot There are two possibilities The noise data to code corresponds to
58. atafile or a greater time base During acquisition an elementary time base has been used to store the short Leq data usually 125ms or 1s It is possible to recalculate noise levels according to a greater time base for example 15 min that is a multiple of the default integration time dBTRAIT32 adjusts automatically the base plot step to the nearest value that matches an elementary time base multiple Similarly it is not possible to recalculate noise indicators according to a step that is smaller than the acquisition time base Sources Remaining sources Background noise Select in a list the noise sources to consider or not for the plot If one wish to display noise sources box Y N ticked on the plot they will be shown in different colours in order to differentiate them from the rest of the data The option Remaining sources allows the user to plot all sources that have not been selected except the background noise as a single source named remaining sources This option may be useful to estimate the contribution of a source compared to all the other sources for instance The selection will be recalled as default value next time such a command is used The option Background noise allows the user to represent all the noise data in the file that have not been coded as a specific noise source called background noise The selection will be recalled as default value next time such a command is used Dynamic range Select th
59. ation are you using the script of a colleague or the script was modified Message Erroneous Sources Type ERR None of the requested sources could be found in the opened file This error appears in operations whose development without sources is impossible ex particular source levels Message Erroneous Periods Type ERR None of the regulated periods specified in the script could be supplied by dBTRAIT32 This error will appear for the listing by statutory periods for all the selected files It is due to a change of period definition between the moment where the script was defined and the present analysis Capture the periods and redefine the script Message Erroneous Channels Type ERR The operation concerns channels that do not exist in the file The script has been defined on the basis of a file having more channels than the file currently been processed Redefine the script on the representative base file Message Execution Impossible Type ERR An error appeared during the execution This could be due to an interruption by the operator during a long operation or an incompatibility of a calculated result e g no valid data Message Modified Parameters Type Reserved for future use Message Modified Sources Type The requested operation could not be applied with the requested source assembly Only the available sources were taken In the case of operations able to be developed without sources e g Time history this mes
60. ay then be replayed with the standard multimedia tools of the Windows environment CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 19 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 1 11 Data storage type concatenate or not all files into a single CMG file The command Preferences Storage allows the user to select the type of data storage of the auxiliary data in a measurement session file CMG If the box Storage in multiple files by default is not ticked all the auxiliary data would be saved into the measurement session file itself At the contrary if this box is ticked the auxiliary data would stored into binary files BID Multiple files Single files Measurement session file TEST CMG Measurement session file Binary files TEST CMG TEST 1 BID TEST 2 BID TEST 3 BID etc according to the number of items created into the session Binary files none See paragraph 3 3 for more information about CMG and BID files in d BENV32 3 1 12 Concatenation of measurement sessions The user can concatenate several measurement sessions in only one global session with the File Concatenation command Select files to concatenate in the following dialogue box Fichiers concat ner Chercher E F amp EE The user can directly concatenate LEQ files 01dB 16 ag eee areas E CoSSOROT Bits programs with CMG measurement sessions They 200633 cma 2606933 cma Co9390602 Wil be converted
61. be considered The LMAX value is the highest value for each time interval Period It is equivalent to the LO value CHAPTER 16 GLOSSARY PAGE 94 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 2 Acoustical quantities relative to noise sources A noise source is a specific type of noise which appeared during the measurement A noise source is usually composed of several noise events appearances Each source is defined by its name and a unique code number Noise source identification is one of the most important elements of short Leq technique A special information source code may be assigned to each elemental time period Coding noise data is described in chapter 6 Once noise events have been coded the following indicators may be calculated 16 2 1 Particular Leq Equivalent sound pressure level in decibels corresponding to a specific source and related to its duration of action The formula is given below P it eqparticular x3 2 J Bre T Where Delta T sum is the cumulated duration of action of the considered noise source Pg is the reference sound pressure level 20 uPa P t is the instantaneous sound pressure of the sound signal L t It is also possible to relate the energy of the source to the complete time period by calculating the partial LEQ 16 2 2 Partial Leq The equivalent sound pressure level in decibels corresponding to a specific source and related to the whole considered time interval It
62. can also customise the way the data is displayed in the software 11 1 Printing results Using the commands of the File menu results can be directly printed by dBTRAIT32 if a printer is connected to the computer of course Use the command File Print to display the Print dialog box Specify which pages should be printed the number of copies and the printer driver to use as well as other parameters print quality etc S dBTrait Jan satolas CMG Print RAEI Printer Name Properties Status Default printer Ready Type OKIPAGE 16n P OKIPAGE 16 AG p P ti Where Graveur p200 okipage iee aeai ee ee eee Comment Imprimer Papier Image Filigrane A propos de Print range Cop Magasin papier Ma asin 1 All Nurr Orientation 1 C KED m js didi S ul s Portrait C Selection Paysage m Disposition 1 enun m Iv Imprimer les ordures A4 210 x 297 mm m Format du papier A4 B5 A5 AB 25 BL 44 80 Lettre Long355 6 Long330 2 Exec COM 10 Monarch COM S S lectionnez le magasin d entr e voulu Standard Aide Corca ge 1 NUM fZ Access directly to the printer configuration dialog box by the command File Print Setup and to a preview of the document to print by the command File Print Preview The toolbar of the print preview window allows the user for example to zoom in the preview document Left margin
63. cumulative distribution plot statistical indices in classes of constant width as a function of level in dB Crom Pusi gp a0 In the above example the statistical index L64 5 48 dB A It means that the noise levels in the datafile are equal to or greater than 48 dB A during 64 5 of the time Similarly the statistical index Lmin corresponding to the minimum short Leq value of the considered time portion is equal to 40 dB A in our example It corresponds to the index L100 the noise level that is exceeded during 100 of the time The statistical index Lmax corresponding to the maximum short Leq value of the considered time portion is equal to 72 dB A in our example It corresponds to the index LO the noise level that is exceeded during 0 of the time CHAPTER 7 STATISTICAL DISTRIBUTION PLOTS PAGE 52 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 8 TABLE OF RESULTS 8 1 Listing of overall acoustical quantities The following functions allow the user to calculate overall noise indicators without taking into account the different noise sources defined Most of the indicators described here are defined in chapter 16 8 1 1 Leq and Ln table overall Use the command Display Leq and Ln to calculate Leq values and statistical indices over a portion or the complete measurement file The following dialog box appears on screen Overall Leg and Ln Table Select the data channels for which the calculations will be performe
64. d Channels Select the overall noise indicators m to calculate Croix Pus v Lmas Tam r LII C Croix Pusi 31 5Hz Lin v Standard deviation Crois Pusi 40Hz Lin gt Taktharimal O gl be Select the time v Statistical levels portion to consider 07 41 01 D7 11 1887 n 53 8 9590501085 End 11 00 23 OF 417 4199 Cancel The software may calculate the following overall noise indicators m Leq 2 Standard deviation m Lmin Statistical indices user defined m Lmax Takt Maximal German version The resulting table of results is displayed in a new window on validation by OK An example is given below urn Overall Leg and Ln Table PUSIGNAN SATOLAS CMG i ES E File PUSIGNAM SATOLAS CMG Start 7 11 87 07 41 01 07 11 97 11 00 23 Sens ee erum use ume Sie use ue Tus us Tus Tur Ta Crom Pusi Ley A 520 395 730 400 42 1 43 1 46 8 53 54 1 552 Croix Pusi Peak Lin 69 3 96 4 E 69 9 722 728 766 812 817 B2 Crom Pusi 1 3 Oct 20Hz Lin 55 2 42 7 fae a 445 4 do 525 56 7 58 60 1 The table of results features a toolbar with icons that allows the user to modify the calculations parameters for example The icons of listing window toolbar allows the user to perform the following operations Change the listing parameters mMm Display as a graphical plot the results in the frequency bands spectrum data E Activate or not the automatic window re
65. d the calculations will also be performed for all the sources selected in the list If the option Background noise is ticked the calculations will be performed for the rest of data The option Overall Leq allows the user to calculate the indicators for coded and uncoded data for each measurement channel The option Weighted can be used to calculate the indicators with weighted sources A source weighting or attenuation by a user defined factor can be defined by the command Source Modify See paragraph 6 3 5 This option is greyed when no attenuation coefficient is defined The resulting table of results is displayed in a new window on validation by OK Source Levels PUSIGNAN SATOULAS CMG Ex PUSIGNAN SATOLAS CMG Start 077117 07 41 01 2 077117 11 00 23 Train Femaining sources Duration Ley Duration Source Lmin Lmax cumulated source Lmin Lmax cumulated Lacation dB dB h min s dB dB dB h min s Cro Pusi Led 5 15 418 614 00 04 31 538 Yo 400 738 01 40 10 Croix Pusi 1 3 Oct 1kHz 42 8 FM 315 5258 00 04 31 44 4 YO 272 649 01 40 10 CHAPTER 8 TABLE OF RESULTS PAGE 58 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL The table of results features a toolbar with icons that allows the user to modify the calculations parameters for example The icons of listing window toolbar allows the user to perform the following operations Change the listing parameters mMm Display as a graphical plot the
66. d an event corresponding to the type of analysis is created in the corresponding information bar on If for example audio records analyses result in a third octave averaged spectrum and a third octave pect BN multispectrum the corresponding events are shown in the information bars below the audio event Mes 4 PF that was analysed CHAPTER 4 TIME HISTORY PLOT PAGE 31 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL From the Aux menu of dBTRAIT32 Audio records can also be processed as soon as a CMG datafile is opened Processing Signal Records Se To do so click on the key in the main Date Tine Durston where Chern Samping Frea dBTRAIT32 toolbar or use the command 7 11 97 07 46 05 10s Croix Pusi 12800 0 7 1 97 D747 25 1D Eroi Pusi 128000 Cancel Aux Frequency analysis and advanced ZEE processing Run If more than one audio 200 Configure file has been recorded a dialog box is ee displayed see aside that allows the user to 07711797 07 IE Crois Pusi 07 11 97 Pots IE Crom Pusi 0 113 7 11 37 08 06 45 10s Croix Pusi a F L 195000 choose which audio records should be 07 11 87 0807 00 10s Crois Pusi 12800 0 07 11 07 0NG 1016 10 Crea Piisi 12000 nm x processed The key Configure accesses the analysis configuration dialog box Once the audio records have been selected in the list click on the Proceed key to start the analysis 4 6 Di
67. d noise levels constant over the whole working day If you have measured a full factory operation i e the duration of the measurement corresponds to the duration of the factory operation select the Within Requested Time Limits option to set the representativity to the duration of the selected time section CHAPTER 9 OCCUPATIONAL NOISE OPTION PAGE 63 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Sources Remaining sources Background noise Select in a list the noise sources to consider or not for the calculations Before proceeding with the calculation it may be required to code events as specific noise sources See chapter 6 for coding noise events The option Remaining sources allows the user to calculate the specified noise indicators for all sources that have not been selected These sources except the background noise are put together as a single source named remaining sources This option may be useful to estimate the contribution of a source compared to all the other sources for instance The selection will be recalled as default value next time such a command is used The option Background noise allows the user to calculate the specified indicators for the source named background This source represents all the noise data in the file that have not been coded as a specific noise source The selection will be recalled as default value next time such a command is used The option Overall Leq allows the user to calculate the e
68. dBTRAIT32 software package processing part of dBENV32 Time History 100ms BUREAU 01DB CMG my Overall Leq and Ln Table BUREAU 01DB CMG ul Eg E miel ollu 2 alal leiz al EE h Voie 1 Leq 100ms A 01 09 98 12h52m25s000 Voie 2 Leq 100ms A 1 Location Weighting i Data type f Start 01 09 98 12 43 28 000 End 01 09 98 13 43 28 000 r i 1 Std Deviation Leq 15min 12h52 12h54 Time History 100ms BUREAU 01DB CMG 7 Quietest Period 15min Meas MEMBER io m mum 212 A eeel elele alelala ml Start 01 09 98 13 21 28 000 e End 01 09 98 13 35 28 000 Comm P Voie 1 Instantaneous Level 62 6 dBA L95 525 dBA Level L95 10 3 dBA Loudest Period relative 15min 01 09 98 12 49 28 000 01 09 98 13 04 28 000 63 0 dBA 48 4 dBA 145 dBA Level L95 Level L95 Voie EM 55 ue ee XE UE EUR PER PRRP ess 2r APE ERA A Pere E E EEA P R EE o EET eee I Bees eed TI eee I 1 ZEE ITI IE Beeren T ZI T Pes 354 i e LA Amplitude Distribution BUREAU 01DB CMG olx Voie 1 Leq camion E ERE 25 i enn n n re enn le DE EJ 20 Voie 1 Leq EET 12h44 12h46 12h48 12h50 12h52 12h54 parole camion voitu 1 1 3 Oct 530 8B bureau 01dB CMG Es i BUREAU 01DB CMG Comments mesure bureau O1dB 111 rue Start 12 43 28 000 mardi 1 septembre 1998 End 13 43 28 000 mardi 1 septembre 19
69. dio records can be played back through the sound system of the computer directly form multispectrum plot Averaged minimum and maximum spectra A B or C weighted can be directly displayed on the plot as well Such plot is only accessible for measurement datafiles taken with the SYMPHONIE or JAZZ system and the dBTRIGJ2 software and the sound level SIP95 with the real time module These instruments allow the user to acquire octave and third octave spectra simultaneously to other acoustical quantities Slow Fast Impulse Peak and Short Leq It may also be the result of a multispectrum analysis of an audio record with the script server utility 5 1 Configuration parameters of the plot Once a measurement datafile is opened click on the icon ud or use the command Display Spectral time history to plot the multispectrum in the CMG datafile The following dialog box is displayed on screen Define the parameters of the plot On validation of this dialog box the spectral time history plot will be displayed in a new window Spectrum Time History Select with the mouse ee channel to plot the channel to display is Display or not coded on the plot ESTE NS ui noise sources in the plot Select one or more UNT m Herrera sources time history Time history channels s eu se Hat coded Senne wee Ee en ae Dynamic range Voie 1 Leg A Set the dynamic a e A Fatima FTH range of the Y axis oe ast Display or not the NR 10 z
70. do so display the audio bar by clicking on the icon It is then displayed below the plot Double click with the mouse on an audio event The audio record is then replayed through the sound system of the computer multimedia sound card or output of the Symphonie acquisition box itr Directly from the time history plot display with a cursor To do so display the audio bar by clicking on the icon It is then displayed below the plot Move the cursor on the audio event to playback as shown Click on the icon or use the command Time history Replay The audio record is then replayed through the sound system of the computer multimedia sound card or output of the Symphonie acquisition box 10 Me If the active cursor is not placed on an audio event the replay button cannot be accessed From the Aux menu of dBTRAIT32 Audio records can also be played back as soon as a CMG datafile has been opened To do so click on the icon or use the command Aux Audio Replay If more than one audio files have been recorded a dialog box is displayed see below that allows the user to choose which audio records should be played back After selecting the audio signal in the list click on Play to listen to it on the computer sound system multimedia sound card or output of the Symphonie acquisition box Enregistrements 07711797 07 46 05 106 Crois Pusi 12800 0 Ji 1 ich 07 4735 103 Crois Pusi Ln 0 07 49 27 103 Cr
71. e events by coding data on the time history plot by using the command or Time history Source between cursors Source Identification EJ To do so click on the icon m The dialog box shown aside appears on screen 1 Eliminated There are two possibilities 5 b Car MM E Plane The noise data to code corresponds to an existing noise source 15 Not coded already defined in the software bore Place the cursors on a time portion of the plot then select in the source list a given pU source type and press the Go key The data in between the cursors on the time Channels to code history plot is then coded Proceed similarly to code other noise sources The noise data to code corresponds to a new noise source not yet Mame motorcycle Click on the key New source The dialog box shown opposite appears on screen Code Cancel defined in the software Give a name and a code number to the new source and validate Then place the cursors on a time portion of the plot then select in the source list a given source type and press the Go key The data in between the cursors on the time history plot is then coded The code with the lowest number has priority to the others Select a lower number in order to code a source over the existing source the code column shows the existing codes ipoe Noise source coding can be applied to one or several measurement p channels Click on the key Channel s to
72. e minimum and maximum values of the Y axis in dB for the plot On validation these parameters will be applied to the plot To automatically adjust these values tick the box Auto NR Select this option to display the NR index Noise Rating on the time history plot Plot active frequency band Select this option to automatically plot the time history of the frequency band selected with the cursor on the spectrum plot If this option is not ticked the plotted time history will not be adjusted when a different frequency band is selected on the plot Leq between cursors This option allows the user to calculate the equivalent sound pressure level corresponding to the time portion in between the cursors of the time history plot This value is displayed on the time history plot If this option is not ticked the value in dB of the considered acoustical quantity is given for the cursor position CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 36 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 5 2 Spectral time history plot display Spectral time history Value in dB of the displayed acoustical quantity window tool bar for each channel at the cursor position or Leq between cursors and NR index Time History 100ms SPECTRE 331108 15645610 CHBG B x gle 5 alal e el elle elel ela Bl Vole 1 Instantaneous Hz EE NR RRR ee T iei OA vee Um B Spectrum display Vole 1 Leg 100ms A Vole 1 1 3 Oct 1 6kHz
73. e of noise source Tt can be used for poo example to simulate how overall levels would be affected if the given Weighting fo dB noise event was reduced by N dB Cancel To activate this option type in SourceWeighting 1 in the field Settings of the DBTRAIT INI file1 CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 49 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 3 6 Convert audio records into sources By using the command Aux Audio Convert to source it is possible to code the noise data time portion corresponding to an audio record duration The user select the audio records to convert giving the start and end times for the coding operation as well as an existing or a new source 6 3 7 Convert comments into sources By using the command Aux Comment Convert to source it is possible to code the noise data time portion corresponding to an audio record duration The user select the audio records to convert giving the start and end times for the coding operation as well as an existing or a new source CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 50 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 7 STATISTICAL DISTRIBUTION PLOTS dBTRAIT32 allows the user to calculate level distribution and cumulated distribution plots of the noise levels contained in the datafile 7 1 Amplitude distribution plot The amplitude distribution plot is an interesting tool to compare the level distribution of various noise sources
74. easurement files under the same path directory as the programme files See the sketch below CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 23 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Configuration and Data files used by dBENV32 see below for further information CONFIGURATION TRANSxxx CLT Galibration history DBHARDS2 INI Hardware database DECDS2 INI Remote control database HCF Hardware conhguraborn TRS light TRN standard TRE expert Measurement configuraton FAS Processing automatic Boring More information are available in dBCONFIG32 on line help dBTRIG32 on line help or manual dBCONFIG32 dBTRIG32 dBTRAIT32 WAW Export of audio files DATA 1 file per mesurement checked date time CMG and BID files date time CMG and BID files etc 1 file per mesurement unchecked CMG and BID files BID files have the CMG name plius an increment number In multiple files checked BID files are still present In multiple files unchecked No more BID files CM collects all data In this manual see paragraph 3 1 11 for information on managing CMG BID files in dBTRAIT32 CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 24 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 TIME HISTORY PLOT The time history plot is one of the main plots available in dBTRAIT32 It represents a plot of sound l
75. ecca toad EI ta 28 4 3 2 PIS LAV nore data DY TING DOFHONS seco addosso a feed ee nN Los ad ttl ah fe 29 4 3 3 Displann ormat on DOES oc decet Dat scien aa e a Res ion cU ELS Po Mee eer I 29 4 3 4 Edad OUS DIG COMMEN S e s esset ete dU UMEN Md SI IU DEUM 29 4 4 PEAY BACK AN AUDIO RECORD AUX MENU ispis cusa tete ai cuo ia tec Deas potuerit dae eden est EE ue tote ali uid aen oed 30 4 5 ANALYSIS OE AN AUDIO RECORD I AUK MENU iisisti eeso eo ae beate teg nentes EEEa dp eque lau en UU pen eG 3l 4 5 1 Analysis configuration YODEHOHS e ne i taie iun ide mu cesse reMa E n NALE LI Marea 31 4 5 2 Rumana SCS MINH 31 4 6 DISPLAY AUDIO RECORD ANALYSIS RESULTS TIME HISTORY MENU sscccceeesscceesesseeeeseesseseeseesenseeeessenseseesseseeseeeass 32 4 7 CODING A NOISE SOURCE TIMETISTORY MENU sd ppo teo ken ted oct eo EE ocu sud toss eruta tUe eques padedest uas NE 33 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM ccsssssssssssssssssssssssssssssscsssccsssssssssssssssssssscsssssssssssssssnees 35 Il CONFIGURATION PARAMETERS OF THE PLOT ectara a a e a a ea a a 35 Se SPECTRAL IIME HISTOR Y PEOT DISPLAY scite toi setadecadeshd st esee aet ito eu hides iio beachte Leste oido dice i e toute Lea De eoe 37 3 9 SPECTRAL TIME HISTORY PLOT TOOLBAR GRAPH MENU zbrisati added Luque etit bean ig alters deba uc uds t boites n 37 2 9 d Serup eranhicar display Para Meters sessed ee tois Decet i e Deom Dato eua ease Gea endure 38
76. ection i ae of the datafiles to demot histogram Ballap1 cmg process in usine CMG amp alaction of a Filename bal9 CMG ball 0 CMG bal2 CMG bal3 C Pieee tg oor Files of type Measurement Session CMG me Script of operations demob FAS Choice of the type of results Destination Simulation on display IM Erase existing files Printer C Agolomerate listings Files Seperate listings The file list allows a multiple selection of CMG files from a specified directory by clicking on each file and holding the CTRL key down The selected files are marked in the list and displayed in the capture window in the visible length limit The chosen script filename is displayed in the middle of the dialogue box The Choose button allows the user to select another script A similar dialog box is displayed for selection of the script file Only one script can be selected at a time Three destinations are possible for the results 12 2 1 Simulation display on the screen It is advised to choose this option first It allows the user to see on the screen each processing step file by file and operation by operation Errors incompatibilities incorrect formats can be therefore detected before launching the true processing 12 2 2 Printing results Each obtained result will be printed Usually a result table or graph takes up one page Some listings such as level per period and counts can
77. ed in a different file sources information in the file sources ini The threshold coding technique of dBTRAIT32 obeys to three criteria or conditions Threshold conditions Threshold field Define the minimum and maximum levels in dB for the type of source to identify In our example select 60dB as minimum and 80 dB as maximum levels All noise levels in the datafile that are contained in the range 60dB to 80dB will meet this first requirement Duration conditions Event duration field Define the minimum and maximum event duration in seconds for the type of source to identify In our example select 1s as minimum duration and 10s as maximum duration All noise levels in the datafile that fits in the range 60dB to 80dB and that lasts for 1s at least and 10s at most will meet the requirements Enhancement conditions Enhancement field In order to extend the noise data coded according to the above conditions define the enhancement duration before and after the coded noise event In our example for a car passing by the time portion of data coded as a Car noise source will be extended by 1s before and after the actual identified event Warning for noise data to be coded with this command the levels duration and enhancements criteria must be fulfilled at the same time CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 48 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 3 4 Example of threshold coding In this theoretical examp
78. eeds of the computer For a 2 dB resolution the Settings section will be written as follows LnResolution 20 CHAPTER 14 HIDDEN FUNCTIONS OF DBTRAIT32 PAGE 87 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 14 2 Sources count 90 854 80 5 70 a 65 col dsl ssl 50 Consider a measurement where sources are coded but with overload risks The events we are interested in may be affected by overload events From the graph we can see that the Usine event appears 4 times in the period represented The event count gives the following result weil 35m00 35m30 Surcharge Usine R siduel GLOK 961 CMG Source Lieu Pond ration D but Fin 11 34 49 375 15 04 96 11 34 51 000 15704796 11 34 57 625 15 04 96 11 35 05 750 15 04 96 11 35 21 000 15704796 11 35 22 525 15 04 36 11 35 23 625 15 04 96 11 35 37 000 15 04 96 11 35 38 625 15 04 96 11 35 40 500 15 04 96 Usine Mein B ro Fast The counting configuration can be set to avoid this problem Any event with a code value of 2 overload should not be considered as discontinuity of the source considered A line ContinuousSource should therefore be added into the Settings section of the dBTRAIT INI file LIN 11 34 46 000 15 04 36 11 35 56 000 15 04 96 0 00 00 87 5 0 00 05 87 5 0 00 01 500 0 00 06 375 0 00 00 875 0 00 00 25 0 0 00 04 87 5 0 00 00 87 5 0 00 01 000 0 00
79. el called Lav Q Once enabled this option allows to select the OSHA Factor Q 3 4 or 5 and the cut off Level in dB It is calculated as follows La q rd Where Las is the A weighted sound pressure level usually exponentially averaged with the SLOW time constant Q is the exchange rate selected in the dialog box q Q Log 2 T is the considered time period The cut off level is the limit below which the level are not taken into account for the OSHA calculation OSHA Dose Click this option in order to include the computation of the OSHA Dose called D Once enabled this option allows to select the Criterion Level It is calculated as follows b 100 plas Leo a4 c g Where Las is the A weighted sound pressure level usually exponentially averaged with the SLOW time constant Q is the exchange rate selected in the dialog box q Q Log 2 Lc is the criterion level selected in the dialog box Tc 8 hours T is the considered time period The cut off level is the limit below which the level are not taken into account for the OSHA calculation Define also the criterion level in dB This level establishes the crossing point between the curve of slope 5 Q exchange rate and the energy curve If for example we have a constant level of 95 dBA measurement with Q 5 will give a dose of 200 for a criterion level of 90dB and 100 for a criterion level of 95dB and 50 for 100 dB The OSHA dose is expressed in time pe
80. entify a source whose appearances are known Source Identifying using time condition or from a time history display Time history or Graph source between cursors In the latter case the start and end times read automatically at cursors positions The Identify icon of the time history plot toolbar provides direct access to source identification using a time condition between cursors 6 2 2 Threshold condition The threshold condition provides automatic identification of the multiple appearances of a given noise source The data to code Short Leqs of the overall noise level or a frequency band time weighted levels corresponds to noise levels between minimum and maximum user defined thresholds Two criteria that are more sophisticated may also help to make the threshold coding more precise Firstly use a condition that set the duration of each source appearance Secondly an extension before and after the threshold may be required usually for moving sources getting closer and going away Example 1 a car Is usually defined by a minimum threshold of 60 dB a maximum threshold of 80 dB a minimum event duration of 1 second and a maximum event duration of 10 seconds Example 2 a plane may fly over the site where the car noise from the previous example is measured It may happen that the noise level of the plane is similar to the average level of cars passing by and the same minimum threshold of 60 dB and maximum threshold of 80 dB shou
81. ere P is the root mean square sound pressure level in Pascal Pref is the reference sound pressure level 20 pPa 16 1 2 Equivalent sound pressure level Leq The LEQ is the equivalent continuous sound pressure level in decibels within a time interval This is the value of the sound pressure level of a continuous steady sound that within a specified time interval t5 t4 has the same root mean square value as the sound under consideration whose level varies with time The calculation of the Leq from the sound pressure level is given by the formula t l E Leg 1 Log PMs tots ta Fag Where Leg T is the equivalent continuous sound pressure level in decibels determined over a reference time interval T starting at tq and ending at tz Pref is the reference sound pressure level 20 pPa P t is the instantaneous sound pressure of the sound signal As a function of the considered time portion we define a complementary term short LEQ for time intervals that vary from a few milliseconds to a few seconds 01dB software packages uses the short Leq principle As for the LEQ the short Leg conserves the energy an a LEQ over a time interval T can be recomposed from short Legs values over the considered time portion The value of the recomposed Leq for N short Leqs over N elementary periods is given by the formula N zs 10 Le LX in nd i Where N is the number of elemental periods Leq T is the short Leq correspondi
82. etwork Network 7 BWetwork CHAPTER 16 GLOSSARY PAGE 97 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 4 2 Correction table of the Weighting Networks versus frequency Nominal Exact Nominal Exact frequency frequency frequency frequency Hz Hz Hz Hz 10 10 704 382 143 500 5012 32 0 3 0 0 125 1259 634 332 122 630 6310 19 0 1 0 0 16 1585 567 285 8 5 800 7943 0 8 0 0 0 0 20 1995 505 242 62 100 100 0 0 0 0 6 0 0 0 0 315 3162 39 4 17 1 3 0 1600 1585 10 0 0 0 1 6 6310 26 2 93 0 8 3150 3162 12 0 4 0 5 8 amp 7943 22 5 74 0 5 4000 3981 10 0 7 08 125 125 9 16 1 4 2 0 2 6300 6310 200 1995 10 9 2 0 0 0 10000 10000 2 5 4 3 4 4 250 2512 86 1 3 0 0 12500 12590 43 6 1 6 2 315 3162 6 6 0 8 0 0 16000 15850 66 8 4 8 5 400 3981 48 05 00 20000 19950 9 3 111 112 16 4 3 Transfer function of the corresponding filters Aweighting network 4x 12200 P H E c o A Seta wes aa V P 2z 20 6 P4 2 12200 P 20 107 7I P 4 2x 737 9 B weighting network 47z 12200 P H UU c MM E umm n P 2z 20 6 P 2 12200 P 27 158 5 C weighting network 4 x 12200
83. evels in dB calculated according to a user defined time base as a function of time The noise data is taken from a CMG datafile Such plot gives not only an overview of a noise climate for a given environment but also an in depth description of particular noise events The time history plot may or may not display existing noise events In this case the noise sources will be displayed with different colours on the plot Audio records can be played back through the sound system of the computer directly form the time history plot Further analysis of audio signals can also be launched from this plot 4 1 Configuration parameters of the plot Once a measurement datafile is opened click on the icon or use the command Display Time History to plot a sound level time history of any acoustical quantity present in the CMG datafile The following dialog box is displayed on screen Define the parameters of the plot On validation of this dialog box the time history plot will be displayed in a new window Sources W anfi Time History gt Time History gt Channels max 5 eg Select with the mouse one or several channels for the plot Display or not coded noise sources in the plot Choose the portions of file for the displayed Horcaded plot fon 01 42 01706 1999 A AEPS Em D inamic range 10 00 02 01 07 1988 Choose the time base 00 00 02 01 071999 Min de hia ele of the acoustical ee 3 100
84. g data in pause mode The corresponding time portion will be coded as eliminated in the datafile and will therefore be ignored for any subsequent post processing operations Code 2 Overload This code is generated automatically during measurement or data transfer All Leqs coded 2 should usually not be taken into account in calculations assimilated to code 1 as the recorded values were not within the linearity range of the instrument at the time of acquisition Code 3 Underload This code is generated automatically during measurement All Leqs coded 3 should usually not be taken into account in calculations assimilated to code 1 as the recorded values were out of the linearity range of the instrument at the time of acquisition Codes 4 to 14 Noise sources These codes are available to code up to 10 different noise events At the time of acquisition on line coding may be performed from code 4 to code 9 Code 15 Background When no source is specified the background noise code number 15 is applied This is the default code for the noise data Warning The priority rule may be transgressed for explicit coding with this number The codes 1 Eliminated 2 Overload 3 Underload and 15 Background are pre set and the values are automatically coded when creating the CMG data file if necessary 6 2 4 Code number priority rule The short Leq method assigns a source code to each elemental time period Each source
85. hannels each one corresponding to a different type of noise data LEQ Peak SLOW FAST Spectra in octaves or third octaves etc for the given measurement channels 2 input channels for SYMPHONIE or JAZZ The CMG datafiles are written to the hard disk of the computer They can be created M Either by an option of dBTRAIT32 software package for noise data transfer to the PC from a compatible data logging integrating sound level meter such as the SIP95 1999 M Either by acquisition software such as dBTRIG32 when using a PC based measurement system such as SYMPHONIE or JAZZ Processing of a CMG datafile in dBTRAIT32 calculates and displays most of the indicators used environmental noise analysis Because dBTRAIT32 can process noise data from various measuring instruments the table shown below summarises which functions are available in the software as a function of the acquisition platform Acoustical quantities Measurement systems Leq peak fast slow Audio recordings impulse Spectra in octaves or third octaves SYMPHONIE JAZZ SIP95 SLS95 amp amp X Yes NO CN SIP95realtime YS NO VS Functions in Time histories Playback Spectrum time histories dBTRAIT32 Statistical analysis Frequency analysis Multispectrum Refer to your measuring instrument user manual for further information on noise data acquisition Any measurement made with O1dB application software is stored in a unique data file the me
86. he last operation the current file is closed and the on screen results erased except if this file was opened before the processing launch At the end of the processing after the last operation on the last file the window entitled Summary can be consulted to check the script process This window can be printed or transferred into another application via the copy paste function CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 76 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 3 1 Leq statistical indices privileged operation The listing of the type Leq and statistical indices is the basis of all data file analysis It is particularly important for the analysis of files obtained from long on site measurements To make the results more easy to use the listing format Leq and statistical indices changes for the automatic processing It is presented under the form of a line per file channel In particular for the treatment of a single channel each data file is listed in a single line The choice of agglomerate listings allows the piling up of lines in the same text file Let us take the example of a 9 day noise measurement split into 24 hour files The script contains the Leq and Ln operation with a day by day file by file listing option File Start End Channel Type 12 11 94 07 00 00 13 11 94 07 00 00 r D 2 BAL9 CMG 11 11 94 07 00 00 BAL10 CMG 12 11 94 07 00 00 BAL2 CMG BAL3 CMG BAL4 CMG BAL5 CMG BAL6 CMG BAL7 CM
87. herefore corresponds to the minima of the frequency bands The maximum spectrum corresponds to the maximum values of the short Leqs for the considered time periods between cursors For each frequency band the maximum value is calculated The maximum spectrum therefore corresponds to the maxima of the frequency bands CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 39 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 5 4 3 Frequency weightings for the spectra A B C and user defined e rS Iu With the icons Al A corresponding respectively to the commands Graph Weightings A B and C it is possible to apply respectively A B or C weightings to the plotted spectrum pow The icon corresponding to the command Graph Weightings User defined allows the user to apply a specific weighting to the spectrum With the help of an external editor the weighting curve values are written in the file dBTRAIT INI create the section UserWgt One line corresponds to one frequency A frequency is represented by an index These indices correspond to the international standard CEI 1260 index 0 for 1000 Hz incremented by 1 for each third octave band above 1000 Hz and reduced by 1 for each third octave band below 1000 Hz The indices are therefore negative for all the frequency bands below 1000 Hz The weighting values are expressed in 1 100 dB All the frequency bands that have not been defined will be eliminated in the resulting spectrum
88. history OK Operation OK BAL3 CMG Display Leg and Ln OK Operation OK BALA CMG Display Time history OK Operation OK BALACMG Display Leg and bn OK Operation OK BALS CMG Display Time history OK Operation OK BALS CMG Display Leg and La OK Operation OK BALB CMG Display Time history OK Operation OK BALB CMG Display Leg and bn OK Operation OK BAL CMG Display Time history OK Operation OK BAL CMG Display Leg and Ln OK Operation OK I BALB CMG Display Time history OK Operation OK BALB CMG Display Leg and Ln OK Operation OK BALT CMG Display Time history OK Operation OK BALI CMG Display Leg and Ln OK Operation OK One line is added after each operation This window remains displayed after the end of the processing as it constitutes the processing report Operation Time history Each operation is first executed on screen independently of the result destination The results are then transferred to a printer or a file Destination Status ily OK If the destination is the screen it first stops with the results displayed and a Comment message for the user to continue Operation OF This logic allows a review of all the operations before printing or saving in exit files The Next button continues with the next operation The All button execute all the other script operations on all the selected files The Cancel button interrupts the script After t
89. i Leg Remaining sources This plot represents the percentage of noise data contained in 1dB level classes for the data coded as aircraft and the rest of the data If the option Background noise was ticked a third distribution would have been plotted that would represent the amplitude distribution of the background noise data not coded in the datafile CHAPTER 7 STATISTICAL DISTRIBUTION PLOTS PAGE 51 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 7 2 Cumulative distribution The cumulative distribution plot is used to display statistical indices or percentiles graphically The percentiles may be calculated with a narrow integration step 0 1 dB which allows particularly accurate study of the level distribution The cumulative distribution is displayed regardless of the existing noise sources overall result Use the command Display Cumulative distribution to plot the statistical distribution The following dialog box appears on screen Cumulative Distribution EJ Channel DUREE Fi li uu uu EE Cancel rom Pusi Lin Measurement channel to take the noise data from Crom Pusi 20Hz Lin Time portion to han EchBus 25e Lin zi consider Define the class width of the distribution plot Start 07 41 01 OF 1171337 5 End Llasswidth 11 00 23 OF 4117199 E li 0 dB The width of each class is defined in dB This value can vary from 0 1 dB to 20 dB in 0 1dB steps Below is a typical
90. iSus eee tive e vete eee ye Eb cd a i edid i Leo aa decease 78 12 5 PVE PR UNG VAC Beata E E E ET E E E E E 78 12 6 ERRORS AND WARNING easa a E ohn ee ies A E E E IPM UOTE 79 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION sssssssssscsccccccesesssssssoooccecssesesssococcccccesesssessssocoocccecessssesssso 81 13 1 HOW TO DEEINE AND CONEIGURE A SCRIPT 4 25544 229142194 0t HE Ie th eg dis aou va eer n dd oun d sto ind aaae AS did ge a PPAR n deu UOS 82 13 2 CONFIGURATION OF EACH ACTIVE PROCESSING nece studeo bere iiaei AE R E E RR R 83 13 2 1 Broad brand analysis averaged spectra and multispectra eessssssss eee eene 83 3 22 Overall level analysis detailed time history 1 diese ietieticeieiicsdettieiedeissecudestecdus stes plated ota Rxb Sable ddas 84 132 3 Ga SONDINO sa ute uc dE M dm M ME dM d nu M d m N 84 TABLE OF CONTENTS PAGE 6 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 14 HIDDEN FUNCTIONS OF DBTRALEL32 reti ee Nen IER ER OE HE QUAS eR onu Y RP ONES End a e eoe e Nux oen e ARN RENS 87 14 1 DIATISTICATINDICBS RESOLU TON dete edi aea es ee ceca Ce as eee E Uu E IUE 87 14 2 SOURCES COUNT d E e d pil dM IM la LIE IM LUMINE 88 14 3 TIMEHISTORY OEPERCENTIDES 2 niches etd Ea nd tere nd Pu er diu nea te eu A UE ntu d rec 89 15 TROUBLESHOOTING ozaro aaa a aa Aa a Eae 91 16 GLOSSARY ironiei EN EEEE ON E EEEN EO E EEE EEEE a 93 16 1 OVERALL ACOUSTICAL QUANT IDIBS aiene E TEE E EA AE 93 16 1 1 SOUNA
91. in Minimum centre frequency of analysis Max Maximum centre frequency of analysis Full octaves If this option is activated the software will set the minimum and maximum frequency limits so that only full octaves are calculated Analysis Select the method used to perform frequency analysis FFT or digital filtering Multispectra If this option is activated the user will obtain the time history over the event duration of the calculated spectrum The time step may vary from 1ms to 1 s Furthermore The choice of maximum frequency for the analysis will depend upon the sampling frequency approximately twice the measurement pass band at which the measurements have been taken from dBTRIG32 if a pass band of 10 kHz was defined for audio records frequency bands greater than this cannot be obtained CHAPTER 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION PAGE 83 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 13 2 2 Overall level analysis detailed time history A detailed time history analysis offers a zoom facility for the time history data over the duration of the event In the script configuration dialog box select an operator of type Overall level in the list of available processings and place it in the list of active processings On operator of name LEQ is then created Select this operator and click on the Edit key The dialog box shown below is displayed on screen The tab Operator gives a detailed description of the operato
92. is identified by its code a number between 1 and 15 If there is no source identified the data is considered as a source type background Only one source may be associated with each time portion The priority rule has been introduced to manage complex noise situations when two or more sources are active at the same time This rule is based on the postulate that a unique code is associated with a source The code number is defined either automatically or by the user When a coding operation is running dBTRAIT32 may face a particular situation when the user is requested to code a new source and that a previously existing source had already been associated to the same time portion The priority rule solves the ambiguity the source with a lower code number has priority over a source with a higher code If the old source has priority lower code no coding will be done at this time moment If the new source has priority it will replace the old one at this time moment Some code numbers are reserved The code 15 highest possible is reserved for background noise Any new source will have a lower code and thus have priority over background noise The code 1 is reserved for the eliminated periods A time period coded with code 1 is eliminated from all subsequent operations plots listings and calculations The code 2 is often used for overload and the code 3 for underloads coding CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 45 DBTRAIT32
93. it is sufficient to limit the calculations to the appropriate time slices of the measurement slices Such an operation can be done manually using the option Leq and Ln of the Display menu for each required time period and then calculating the overall level The option Statutory periods allows the user to perform automatically these fastidious calculations The term statutory periods does not only apply to standardised time periods but also to user defined time periods One can define for example the period between 18h and 19h corresponding to the time people come back from the office Even if such a period does not apply to any regulation dBTRAIT32 will accurately calculate noise levels Two operations are necessary to obtain noise levels during specific periods Definition amp edition of the time periods Definition of the calculation parameters and results display To define statutory periods use the command Preferences Statutory periods This issue is dealt with in chapter 10 Use the command Display Statutory periods for calculations of the acoustical indicators corresponding to the statutory periods defined by the user The following dialog box appears on screen Hoise Level in Statutory Feriods Select the datafile Channel Periods channel for which Select the statutory calculations will be MINI ESTER a c M T en working days periods made Crois Pusi rom Puszi 20Hz Lin rom Pusi 25Hz Lin Craw Piss 021
94. ith the command Display Amplitude distribution Similarly use the command Display Cumulative distribution to display a cumulative distribution of the noise levels See paragraph 7 E Step 3 Optional Playback and frequency analysis of audio records It is possible to directly playback audio records from a time history plot by a single mouse click Using the commands of the Aux menu aux for auxiliary data will allow the user to perform frequency analysis of the audio records See paragraphs 4 4 4 5 and 13 BH Step 4 Optional Noise source coding Depending on the Leq pattern of the noise data and with help of user s comments and audio records noise source identification is an easy operation to perform When a noise event as been identified the commands of the menu Source allow the operator to code these noise events in the data stream for later analysis See paragraphs 4 7 and 6 Step 5 TABLES Results listings Use the commands of the Display menu to calculate for example the overall Leq and statistical indices for the whole duration of the datafile or for user defined time periods Other calculations give result tables such as Leq by noise source and occurrence the Peak Lmin Lmax Slow Fast Impulse SEL etc levels the loudest and quietest periods etc See paragraph 8 Optionally a module can be used to calculate occupational noise indicators See paragraph 9 E Step 6 Printing the results Edition of a test
95. l Channel Header Modification Domain The calibration correction factor to apply to the noise data of the selected measurement channel This adjustment Channel eu apply to all data linked to this channel After editing these parameters use the key Modify to validate um the modifications without exiting the dialog box Location Channel 2 Calibration correction dB 0 0 CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT32 PAGE 17 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 1 9 Import LEQ datafiles to the new format For users of the 16 bit version it is possible to import old measurement datafiles LEQ data format into a measurement session file Any data linked to the LEQ datafile WAV files other LEQ files resulting from an audio record analysis etc will be imported as well as long as they are located in the same directory of the main LEQ datafile To import an old LEQ measurement file proceed as follows Create a new measurement session file CMG by using the command File New or open an existing CMG file by using the command File Open Select a comment for new files and validate 3m 5 mg j pusx b leq Look irr zj pusxt1 leq a8 pussa leq Import the LEQ datafile of your choice by the cg a pussl12leq CP command File Import The dialog box shown aa pusxl3 leq amp bspus O01 leq Apusx1L leq rs on screen lm pusx035 leq e puss006
96. lay Value in dB of the displayed acoustical Time history window tool quantity for each channel at the cursor bar position or Leq between cursors oa Time History 1s PUSIGNAN SATOLAS CMG a dl ERE ACC Croix Pusi Legis A dB Cram Pusi Peak 1s Lin o4 Gils ix ff Teas Audio i NENNEN D NU D GNU FOR RR ee eee Information bars on the auxiliary data linked to the time history audio recordings spectra multispectra and detailled time histories parrallel measurements and comments The time history plot window features a tool bar that gives access to functions such as coding a noise source between cursors analysing in frequency and or time domains audio records playback editing comments etc dBTRAIT32 can display up to five information bars which represent auxiliary data associated with the time history plot Overload bar OVL that references any overloads or underloads m Audio bar Audio that references audio recordings made during acquisition Comments bar Comm for information on the measurement session When audio recordings are processed Spectrum bar Spect that shows an averaged spectrum in octaves third octaves or 1 Nth octaves m Multispectrum and zoom bar Mes that shows respectively a spectral time history plot in octaves third octaves or 1 Nth octaves and a detailed time history of an overall noise quantity A double click with the mouse on these events allows the user to dis
97. ld be used for source identification Different duration limits may be set to distinguish the two sources minimum event duration of 30 second for planes can be used for example Coding using a threshold condition is the most performing source identification technique as the user defines the Leq pattern minimum and maximum levels and duration of a source but it requires a good knowledge of the coding principles We recommend this method for advanced users Once the source identification criteria have been defined noise data that fulfils the conditions are affected to a given noise source according to a priority rule based on the code number CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 44 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 2 3 Definitions of code numbers The code number of a source is the unique internal identifier of a defined noise event It varies between 1 and 15 Each elemental time period of each measurement channel independently may have a different associated code number The following list describe the code numbers Code 1 Eliminated Any data coded with code 1 will not be taken into account for post processing functions and data plots This code eliminates external annoyances which have nothing to do with the noise environment to study for example ones can eliminate from a measurement the noise made by the operator or a third party During acquisition the software associates code 1 to the measured short Le
98. le the threshold conditions have been defined Minimum threshold 60 dB Maximum threshold 80 dB Minimum event duration 1 second Maximum event duration 10 seconds Enhancement duration before and after the event 1 second Max Threshold 80 dB Min Threshold 60 dB TEN PT Enhancement before amp after 1 second Car 1 Shot Car 2 Compressor dBTRAIT32 will automatically code car no 1 and car no 2 but will not code the gunshot event because this event duration is less than 1 second nor the compressor event because this event duration is more than 10 seconds The enhancement duration before and after the coded event allows the program to code as well data that is obviously part of the event but for which their values are below the minimum threshold 6 3 5 Modifications of existing sources Source menu Modification of sources Source Use the command Source Modify to change or remove the different nmm types of existing sources in dBTRAIT32 The following dialog box is displayed on screen Delete Dog barking g Eliminated gt Select a source type in the list and click on Modify to edit the name and the priority code number of the source or click on Delete to completely remove this type of source from the datafile Source Modification Mame Train The Weighting field in dB corresponds to a correction factor that will be se D nl applied to all data coded with this typ
99. me to the script 3 Set of active processings currently part of the script These operators will be activated to analyse independently a set of audio events 4 Edit the parameters of the selected operator in the list of available processings Each operator shows its own configuration dialog box 5 Comments describing the operator selected in tha available processings list If an operator from the active processings list is selected the comment field shows the type of the operator 6 Key gt gt that allows to add an operator into the active processings list Different operators of the same type may be added the user may for example define a multispectrum analysis in third octave band with different time steps A generic name for each operator is given by default 7 The key remove allows the user to remove an operator from the list of the active processings Once the list of active processings has been defined edit each one of them to define the calculation parameters CHAPTER 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION PAGE 82 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 13 2 Configuration of each active processing Once the list of active processings has been defined in the script configuration dialog box define the calculation parameters of each operator To do so select an operator in the list and click on the Edit key An operator applies a given processing on a quantity or a set of quantities audio data in the pre
100. mm p x i Upper margin mm m _Cancel i aidea mm pu 8 Hetght mm fia d Graphic print out Left margin rm a When printing graphics the user can set a few EDIT E I p B additional parameters by the commands aie Preferences Graphic printout Time history es and Histograms EG Width mm The user can set the margins of the graphic printout Time scale MERE URINE Ta mm secon Ww s elm o g frame and when printing a time history plot the ET dimensions in mm for the time scale X axis and EENEDH E Cancel the level scale Y axis yu mm Ure It is also possible to define the colours of each curves of the printout by using the command Preferences Colours Printer See paragraph 11 4 CHAPTER 11 RESULT EXPLOITATION amp CUSTOMISATION PAGE 69 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 11 2 Exporting data to a spreadsheet and word processors The user may either export results as graphics time history plots and results listings by the command Edit copy Image or export the results as values by the command Edit Copy Values After the copy command of dBTRAIT32 simply paste Edit Paste the data in a word processor or a spreadsheet processor as shown below PES lr Leq global JAN SATOLAS CMG wE Ei JAN SATOLAS CMG x D but 07 11 97 07 28 18 07 11 97 11 10 08 Voie Type dB Leg Lmin Lmax L10 hayfield road Leq A 627 355 852 407 hayfield road Cr te Lin 67
101. mum maximum and averaged spectrum values Display the last section of the file for the time portion between the cursors positions iJ Iv e e CHAPTER 5 SPECTRAL TIME HISTORY PLOT MULTISPECTRUM PAGE 37 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL These commands are also accessible by the Graph menu activated when the active window is a spectral time history or by clicking on the spectral time history with the right mouse button 5 3 1 Set up graphical display parameters Set up the graphical display parameters by clicking on the icon or by using the command Spectral Graph Configure plot The plot is updated immediately when a modification is made Each plot has its own settings dialog box a modification on one plot does not affect the settings of another plot Display or not the Y axis scale and select the graph dynamic range constant range or set up manually the minimum and maximum limits Display or not X axis scale and set shift percentage for dynamic curves not used in dBTRAIT Cursor s Show Hide one or two cursors joy e on the plot d EN Constant range Value M n na Sts sev an E m Ehoice M Info bars E Iv Legend 0 Max DE Zoom In INE Zoom in the plot for the time Display or not a grid on the plot portion between cursors IN the information bars and the key Zoom out the plot OUT labels for noise sources 5 3 2 Display noise data by time portions
102. n the on line source identification process Consult the SIP95 user manual for further information of coding at acquisition Note that for the expert module of dBTRIG32 it is also possible to perform simultaneous coding of noise sources Coding during processing off line The first step of the off line source identification process is to define a noise source A source is defined by its identifier a string of characters and an internal identifier its code number The code number is a unique number between 1 and 15 Some of these codes are pre set and cannot be modified After defining the source select a time portion of the measurement and code it as a specific noise source The identification itself follows precise rules and may be performed using various methods cursors known time limits threshold etc When sources are identified the following indicators may be calculated for each noise source Tables Graphics Particular Leq Partial Leq Time history SEL LMIN LMAX Statistical distribution Counting sources appearances Contribution of sources to overall noise level CHAPTER 6 IDENTIFICATION OF NOISE SOURCES PAGE 43 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 6 2 Source identification techniques We describe in this paragraph the principles and the techniques used in O1dB programs to identify a noise source 6 2 1 Time condition The noise source is defined by time limits start and end This may be used to id
103. ng to the ith sample expressed in dB Each short Leq sample can be associated with a noise source using the coding technique Therefore each time portion of a measurement can be assigned to a specific noise event allowing us to calculate specific indicators related to noise events The value of the recomposed Leq for N short Leqs for a specific noise event over N elementary periods is given by the same formula CHAPTER 16 GLOSSARY PAGE 93 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 16 1 3 Peak level The Peak level is the maximum absolute value of instantaneous sound pressure within a time interval It is expressed in dB r f 2e 5 Pa 16 1 4 Percentiles Statistical indices The percentile Ln is the sound pressure level that is exceeded N of the time interval considered Symbols LN T for example Los 1g is the level exceeded for 95 of 1h L100 value exceeded during 100 of the time interval value is also called LMIN LO value exceeded during 0 of the time interval value is called LMAX 16 1 5 LMIN It is the minimum short term LEQ value for the considered time period For a defined time interval a certain number of short term LEQ are to be considered The LMIN value is the lowest value for each time interval Period It is equivalent to the L100 value 16 1 6 LMAX It is the maximum short term LEQ value for the considered time period For a defined time interval a certain number of short term LEQ are to
104. noise sources CHAPTER 4 TIME HISTORY PLOT Show Hide one or two cursors on the plot Show Hide cursors values and select channels Zoom in the plot for the time portion between cursors IN Zoom out the plot OUT PAGE 28 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 3 2 Display noise data by time portions It is possible to navigate from a time section of the data file to another by using the icons I or the commands Time history File start Previous section Next section File end if the time history plot display does not cover the complete duration of the datafile Example For a 24 hour measurement file starting at 08 00am and ending at 08 00am the next day the operator display a time history plot for the time portion starting at 16 00 and ending at 17 00 Click on the icon to display the next time portion of the plot 17 00 18 00 then Click on the icon to display the last time portion of the plot 07 00 08 00 then Click on the icon to display the previous time portion of the plot 06 00 07 00 then Click on the icon to display the first time portion of the plot 08 00 09 00 If the complete file is displayed on the plot the time portion icons cannot be accessed greyed 4 3 3 Display information bars mn unl pF am With the icons je ud 2 8 or the commands Time history Information bars it is possible to display or hide information bars of auxiliary data o
105. of the Aux menu It is possible to access directly to any parallel measurement by using the navigation data flow list in the main toolbar The measurement session information window is refreshed each time a different dataflow is selected CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 21 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL The drawing shown below is an example of the results obtained for the main dataflow over the complete duration of the measurement session and a complementary data flow that is a parallel measurement over the duration of an event gt Main data flow over the complete duration of the measurement Parallel measurement n 1 over the duration of an event Total duration of the measurement session file CMG Most of the functions listed above can be accessed by the commands of the Display menu A complete description of each function is given in the following chapters CHAPITRE 3 DATAFILE MANAGEMENT IN DBTRAIT 32 PAGE 22 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 3 3 Summary Files used by dBENV32 dBTRIG32 dBTRAIT32 O1dB software uses or creates different type of files Program files Parameter files Data files Program files These files are an integral part of the measurement system They combine libraries of functions DLL files that are common to several programmes executable files EXE files for each specific software modules and driver files DRV files specific
106. om Pusi 1 ze ia 1 37 OF 51 29 103 Crom Pusi 1 itii 07711797 07 55 03 10s Crois Pusi 1 128600 0 07711797 0 5226 Is Crois Pusi 1 126800 0 07711797 08 06 45 1s Crom Pusi 1 128600 0 07711797 08 07 00 105 Crois Pusi 1 128600 0 i Individual channels obe The option Individual channels allows the user to playback dual channel audio signals separately channel 1 and channel 2 are identified in the list If this box is not ticked the channels of the audio signal will be played on each way of the loudspeaker CHAPTER 4 TIME HISTORY PLOT PAGE 30 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 5 Analysis of an audio record Aux menu The user may analyse audio records in both time and frequency domains according to user defined parameters directly from a time history plot 4 5 1 Analysis configuration options Use the command Aux Frequency analysis and advanced processing Configure to define the parameters of the audio record analyses The script configuration dialog box is displayed on screen The analysis types are ions lt Average spectrum in octaves and third Designation ein name octaves Available processings Active processings 3 a Average spectrum in 1 6 1 12 1 24 or Slow Bms j multi 1 3act avg 1 4Bact Hiemuve Broad band spectrum Undersampling Overall level ee 1 48 octaves option multispectrum in 1 Nth octave spectrum time history and A Lin global levels calcula
107. ome of the noise indicators recomposed from the original short Leq data The quantities described below are defined in chapter 16 Level dB Leg Hp du M source LMax LMin Source 2 788 A NEN Time Partial Leg tl t2 t2 Leuq tl t2 tl t2 CHAPTER 1 INTRODUCTION TO DBTRAIT32 PAGE 10 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 1 3 What is new in dBTRAIT32 The new functions of 01dB 32 bit software packages with respect to dBTRAIT32 are listed below 1 3 1 Version 4 03 Time history plot per statutory periods Refer to paragraph 4 1 for more information Simplified measurement session concatenation process It is now possible to concatenate both several CMG measurement sessions and LEQ 16 bit datafiles into a single measurement session by using the command File Concatenate paragraph 3 1 12 A weighted time history into a multispectrum time history plot along with the time history of the noise levels for a given frequency band Refer to paragraph 5 1 for more information Modifications of the coding between cursors function The column code number has been added for a quick overview of the existing code numbers and for selection of adequate code numbers for new sources Refer to paragraph 4 7 for more information 1 3 2 Version 4 0 New data file format CMG common to all O1dB application software packages All the noise data acquired by dBTRIG32 are now saved to the compu
108. ons E E and les corresponding respectively to the commands Graph Averaged spectrum minimum spectrum and maximum spectrum it is possible to replace the instantaneous spectrum by the averaged minimum or maximum spectra calculated for the time portion in between the cursors The averaged spectrum corresponds to the average of all instantaneous spectra between the cursors The minimum spectrum corresponds to the minimum values of the short Legs for the considered time periods between cursors For each frequency band the minimum value is calculated The minimum spectrum therefore corresponds to the minima of the frequency bands The maximum spectrum corresponds to the maximum values of the short Leqs for the considered time periods between cursors For each frequency band the maximum value is calculated The maximum spectrum therefore corresponds to the maxima of the frequency bands corresponding respectively to the commands Graph Averaged spectrum minimum spectrum and maximum spectrum it is possible to replace the instantaneous spectrum by the averaged minimum or maximum spectra calculated for the time portion in between the cursors The averaged spectrum corresponds to the average of all instantaneous spectra between the cursors The minimum spectrum corresponds to the minimum values of the short Leqs for the considered time periods between cursors For each frequency band the minimum value is calculated The minimum spectrum t
109. paragraph 8 1 1 and or levels for noise sources see paragraph 8 2 1 the resulting indicators may be displayed in a graphical manner if the measurement channels selected for the calculations correspond to the frequency bands of a spectrum This type of graphic may be accessed by the icon int the table of results or by the command Listing Plot spectra Spectre JAN_001 LEQ Point 1 BENE BE Point 1 Linin Point 1 Lrnax Point 1 L95 BET Point 1 L90 BEES Point 1 L50 BET O0 E i i i i i 250 500 A maximum of 6 curves can be plotted simultaneously on the same graphic CHAPTER 8 TABLE OF RESULTS PAGE 62 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 9 OCCUPATIONAL NOISE OPTION Use the command Display Occupational noise to calculate acoustical indicators related to various regulations of noise at work The following indicators may be calculated globally or for each selected noise sources Noise Exposure Level 8 h Day Sound Exposure in Pa s Pa min or Pa h Peak level OSHA level OSHA dose The occupational noise dialogue box will be displayed in order to define the parameters of the calculation The listing of the occupational noise indicators is therefore displayed Occupational Nowe Descriptors v Noise exposure level Bh day W Sound exposure Pas Pamin C Path v Peak level OSHA Start v Level C 3 C 4 5 07 41 01 OF 17 41997 g End 11 00
110. perator gives a detailed description of the operator and allows the user to define a more specific name for it DECIM D Undersampling In the tab Configuration the following analysis parameters may be defined Operator Configuration Notification Required frequency range define the maximum pec ee i eduemey Longe sz 2500 frequency of the audio event after undersampling Filter order a0 It is recommended not to undersample audio files below 2000 Slope dB per octave 120 Hz unless source recognition by playing back the file is unimportant The size of audio recordings in term of memory space depends on the pass band declared in the configuration box A table shows the size in kilobytes of audio records as a function of the pass band e Save the result Uk Cancel CHAPTER 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION PAGE 84 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Even if audio files have been analysed at the time of acquisition you may process them again with different parameters in dBTRAIT32 It is therefore recommended not to undersample the audio files in dBTRIG32 since the sampling rate becomes the upper band limit for a further analysis The audio file decimation factor is equal to the ratio of measurement frequency and under sampling rate Be aware that only whole integers multiples of 2 or 5 are taken into account The following results are valid for audio records of 10 s long
111. play in another window the auxiliary data playback of an audio record display a spectrum a multispectrum a detailed time history or a comment All actions dealing with auxiliary data are accessible through the commands of the Aux menu It allows the user to manage these events edition delete events analyse audio records display events etc The Parallel measurements bar corresponds to the analysis of audio records that vary with time such as a multispectrum or a detailed time history Access directly to such measurements by using the data flow navigation bar in the main toolbar of dBTRAIT32 CHAPTER 4 TIME HISTORY PLOT PAGE 27 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL A w Time history plot toolbar time history menu Ed Define again the plot parameters i n Control parameters for the graphical display aT M Listen to the audio record corresponding to the cursor position Analysis of the audio record corresponding to the cursor position iv vj 5 Edit a comment that runs for the time portion between the cursors positions iS s EW Identify a noise source code for the time portion between the cursors positions Wi i iE i Search the next apparition of a noise source p Zoom on the time history section in between the cursors F Link the cursors together Display Hide the parallel auxiliary data that varies with time End of the zoom Go back to previous view Display
112. ption does not present any difficulties it is sufficient to explicitly state the file extension For example here is a spectral time history resulting from the automatic processing progress Use the command Insert Picture in Word to insert it in a report Insert Picture H E Look in E Dema HE spus O01 O00 T Cancel O S T FTL Advanced T Link to file I Save with dacument eps O01 EO n Xpusx006 000 aa SpusxO106 t00 aa Bpusx009 000 a Spusx009 t00 3 Iv Float over text Find Files that match these search criteria File name Text ar property Find Mew Files of type fal Files Last modified any Fire Mew Search 6 File s Found 12 5 Helpful advice An erroneous definition can lead to parameter changes of an operation or even to the impossibility of its execution To minimise the possibility of errors it is advised To make a preliminary simulation Errors can be detected one by one and the script can therefore be redefined To define the script using a file as close as possible to the file assembly which will be treated Simple example an operation designed for channel 2 of a file to multiple files Leq Fast Peak and frequency data will produce an error if the script is applied to a mono channel file To pay particular attention to sources the numbers of the codes must be identical for a correct processing To not change the dBTRAIT
113. quivalent sound pressure level for each selected source over the considered time portion This value will be display at the bottom of the listing window Noise exposure level 8h day Click this option in order to include the computation of the Noise Exposure Level called LEX d It is calculated as follows 1 ffa if Fi Ug 0 LEY d 10 Lo cit Where To is the reference duration TO 28800 s 8 hours Ty is the representative duration defined as representativity in the dialog box PA t is the A weighted sound pressure level Py is the reference sound pressure level P 2 Pa Sound exposure Click this option in order to include the computation of the Sound Exposure called Ear Once enabled this option allows to select the units to express the Sound Exposure Pa2s Pa2min or Pa2h It is calculated as follows f EAT p E f Where PA t is the A weighted sound pressure level Peaklevel Click this option in order to include the computation of the Peak Level called Lpc This option is only available if a Peak Channel exists It is calculated as follows Ly 10Lod D re Fh Where PC is the maximum instantaneous sound pressure level over the considered time interval Py is the reference sound pressure level Py 2 Pa CHAPTER 9 OCCUPATIONAL NOISE OPTION PAGE 64 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL OSHA level Click this option in order to include the computation of the OSHA Lev
114. r and allows the user to define a more specific name for it Slow 5ms Overall level In the tab Configuration the following analysis parameters S may be defined Operator Configuration Notification Time step it is the integration time for the calculation of Time step fo amp E ms an overall Leq level It may vary between 1 ms and 1s Frequency weighting select a frequency weighting to Frequency weighting calculate the overall level A B C Lin Time weighting select the overall noise quantity to Time weighting Leq E calculate Leq Peak Slow Fast Impulse If for example a time step of 1 s is chosen for a 2 s long audio recording only two values will be calculated one value per second The result will therefore be useless It is recommended to specify as small a step as possible without increasing calculation time too much p Save the result Cancel Excessive calculation time may cause problems if the computer has insufficient power This should also be remembered with respect to the number of quantities and weightings involved in the calculation 13 2 3 Undersampling In the script configuration dialog box select an operator of type Undersampling in the list of available processings and place it in the list of active processings On operator of name DECIM is then created Select this operator and click on the Edit key The dialog box shown below is displayed on screen The tab O
115. rcentile of the acceptable dose A Exposure USINE CMG el Ei fl ES USINE CMG Cascales File Location Weighting Data type Start Here is an example of results of occupational noise calculation It may be done with or without the existing sources over a section of the considered file The term source may be in this case applied 20 04 98 10 02 31 000 to a particular industrial operation The operator can calculate the Presses 20 04 98 15 42 54 000 contribution of different operations on the global daily noise LEXd EAD OSHA G 5 Dose G 5 cuurce dBA Pats oo fenwik compressor Background Overall Copy this result listing command Edit Copy as values or graphics for further exploitation and result presentation in spreadsheet or word processors CHAPTER 9 OCCUPATIONAL NOISE OPTION PAGE 65 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 10 DEFINITIONS OF STATUORY PERIODS Use the command Preferences statutory periods to define time periods according to which noise levels may be calculated see paragraph 8 1 3 The dialog box shown below appears on screen Statutory Periods Patek The choice is given between definition of weekly and daily periods working days A Daily period means that it will be repeated identically whatever the day of the week For example no difference will be made between results in the time slice 8h 20h of a week day and a bank
116. sage appears even if no sources were found Redefine the script for the representative base file having the same sources as the treated file Message Modified Period Duration Type The requested operation could not be developed with the requested period This is due to an incompatibility of period duration For example the plot by 5 second periods is not possible in the case of a file having an elementary period of 10 seconds nor 3 seconds The duration is adjusted CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 79 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION It is possible to user to analyse in both frequency and time domains audio records made with the software dBTRIG32 either automatically at the time of acquisition in dBTRIG32 or at the processing stage in dBTRAIT32 using the multitasking capabilities of Windows Script configuration XI Designation script name Available processings Active processings Slow 5ms avg 1 48act multi 1 3act E eli es Broad band spectrum A Undersarmpling Comments Edit This analysis results in a short Legs time history of the time signal un I Frequency Lin A B C and time Leg Peak Fast ete weightings can be applied j Cancel The analysis types are m Frequency analysis averaged spectrum over the audio event duration in octaves 1 3 octaves Frequency analysis in 1 6th 1 12th 1 24th and
117. sent application software Each type of operator has its own name and a set of analysis parameters Furthermore The progress of each calculation is shown to the user at user defined intervals In dBTRIG32 and dBTRAIT32 the following operators may be selected Broad band spectra averaged spectra et multispectra Audio record undersampling Detailed time history of an overall level 13 2 1 Broad brand analysis averaged spectra and multispectra In the script configuration dialog box select an operator of type octave and third octave spectra or if you have the 1 N octaves option Broad band spectrum in the list of available processings and place it in the list of active processings On operator of name FC is then created Select this operator and click on the Edit key The dialog box shown below is displayed on screen The tab Operator gives a detailed description of the operator and allows the user to define a more specific name for it avg 1 4 oct Broad band spectrum Operator Configuration Notification Frequencies Bandwidth Min Hz has Hz Full octaves mE puce ror Digital filtering Hie result i Cancel I4 Save In the tab Configuration the following analysis parameters may be defined Bandwidth to define the spectrum bandwidth for the analysis Octaves and 1 3 octaves by default 1 1 1 3 1 6 1 12 1 24 et 1 48 octaves in option M
118. sizing operation when the contents have changed For more information on how to display noise indicators graphically see paragraph 8 3 These calculations are made without taking into account existing noise sources For more information on the calculations of noise indicators with sources information see paragraph 8 2 CHAPTER 8 TABLE OF RESULTS PAGE 53 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 8 1 2 Leq and Ln per period Use the command Display Leq and Ln per period to calculate Leq values and statistical indices over a portion or the complete measurement file for user defined time periods The following dialog box appears on screen Leg and Ln Table by Period 777 e 7 INN Crom Puzi Ln Crom Pusi 2UHz Lin Crois Pusi 25Hz Lin Crom Piisi xl Select the data channel for which the calculations will be performed Channel Select the time portion to consider ir Items Select the noise Start indi at mo indicators to 07 41 01 07 11 1397 F mo calculate End Select the time 11 00 23 07 11 1987 period for the calculations W Lmas v Standard deviation Mak hanima 1 gate bs v Statistical levels 2 8 35 30 50 1085 Period h min s 00 15 00 M Round The software may calculate the following indicators for each period Leq m Standard deviation m Lmin z Statistical indices user defined m Lmax Takt Maximal German version The resulting table of resul
119. sources with intelligent coding techniques etc Partnered with the uniquely powerful environmental noise acquisition software dBTRIG32 the dBTRAIT32 application software is an ideal investigation tool which makes data processing easy and helps the user to analyse any given noise nuisance problem The user friendly interface ensures that the inexperienced user quickly becomes familiar with the system and results can easily be exported to word processors or spreadsheets for documentation or further calculation 1 2 Main functions We give below a list of the main functions of the dBTRAIT32 software package To use these functions please refer to the appropriate section of this manual Y Temporal Analysis Of Acoustical Quantities Time history Short Leq Peak Slow Fast etc displayed on any time basis and over user defined periods Y Frequency Analysis Of Audio Signals Averaged spectra in octaves and third octaves of audio recordings 1 48 octave band analysis available depending of the configuration Audio signal playback CD quality sound from within the time history plot Y Multispectrum Analysis Time history of a spectrum in octaves and third octaves over the whole measurement duration with SYMPHONIE and the SIP95 real time module or for audio records script server option with access to minimum maximum and averaged spectra weighted or unweighted with overall levels Y Result Processing Results shown as tables or colour
120. splay audio record analysis results Time history menu The results of the audio records analyses can be directly accessed on the time history plot by a double click on the corresponding event or by using the Time History Display commands These results are otherwise accessible through the commands of the Aux menu T Evolution 100ms BUREAU 01DB CMG 12h54 12h55 12h56 12h57 12h58 12h59 13h00 13h01 Spectre 01 09 98 12 53 36 Voie 1 1 3 d octave asurement to Display Dae Time Duin we Chama Tess Dialog box displayed to select the Parallel measurement events multispectra and or detailed time histories 6 10s Po 1 07 11 97 07 41 28 10s Point1 1 07 11 97 07 41 28 10s Point1 1 07 11 87 074128 10s Point1 1 125ms 07 11 97 07 42 07 10s Point1 1 07 11 97 074207 10s i 1 Display Cancel A double click on a Spectrum event displays an averaged spectrum in 1 N octave bands Evolution 125ms BUREAU OIDB CMG TST ES Be e i 1 elele eee ml kian 5ms BUREAU 01DB CMG Voie 2 Instantan ET EEs NR e B e D 7 RA l 3 LiT V7 l EN aE EM E 53m37 53m38 53m39 53m40 53m4i Display a detailed time history Display the time history per frequency band multispectrum CHAPTER 4 TIME HISTORY PLOT PAGE 32 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 7 Coding a noise source Time history menu It is possible to identify nois
121. splayed time history plots result tables etc The drawing shown below describe the hierarchy of all the documents that can be created from a CMG file CMG file Spectral time history Em Leq and statistical plot indices overall EF Noise source levels Time history plot E overall E Level distribution Bill Leq and statistical indices per periods Cumulated distribution EP Noise source levels ED per periods LER Leq per statutory E periods m Loudest and quietest periods Bill Occupational noise Frequency analysis of MERI E audio records Spectrum multispectrum detailed time history Noise sources count The main window is the file information window to which any other views are related When closing the main information window all dependant windows are closed However any dependant windows may be closed separately In addition to the acoustical data in CMG files dBTRAIT32 references comments audio records and overloads in the data stream These audio records can be themselves analysed averaged spectrum over the event duration multispectrum time history of an overall quantity etc We will therefore speak of auxiliary data for all these events and in particular for the multispectra and the detailed time histories of parallel measurements They can be viewed directly from the time history plot into information bars In a more general manner the auxiliary data can be displayed by the commands
122. st 2003 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL TABLE OF CONTENTS T INTRODUCTION IO DBERALL32 arraroan neue ea eta Un I VO EN EE VD RII OR Veo Fax cosas bons XXL VOTERS UU ELO E NC EPOH LH V NERNERN 9 l l OVERVIEW ECC T ad 9 1 2 MAIN FONCTION Sca cic Sar etus etate uice tue e lass eodu oic Lacu mius tlg eode cuiu Le Ml Me IE 9 1 3 WHATISNEWNDBIRAID 2 ia TE AE E 11 I3 E TO US eec conum m cun ieu M CD AL IDCM LM duc MD LL SMES ee eC 11 Ye a VORSIOI SO sisi nt utc ses stale A tpi eth Seiten Ake eet tel Dh cheek laced tree 11 2 WXAXDLATPROCESSINGINDBIRALILD3 5 ooh Rp d a ie ioc a diat ete p idis hd n Vue eut 13 2 1 ANALY SIS CAPABILI IES C c 13 2 2 ANALY STS PROCESS udis iamdictis hala a shin loden icu Ueles ut eee et cid a is ced ades Tad Tode ER 14 3 DATAFILE MANAGEMENT IN DB DRA UES 2 recie ayer eia ceaseess DO YE IY EYE FO x NUT KE XR CY Y pO P Y OY Verve 15 3 1 CMG DATAFILE MANAGEMENT ENVIRONMENTAL ACOUSTICS cieesseeeeeeeeee eene eene nene nenenn tenen nennen enne nnne ener eere e nene 15 Sitch 48 272 147 VIG Yas SE A Ne SR chest NN RE 15 3 22 Inlormamon WING OW Of d C Mr flle errre i oV n coq odit NR Ro xeu don ie vcn epu deteltut ede secu tue ev suce tel 16 3 1 3 Main ooa TOR COMCI TIS 4 hihi ota stude sias ur Mucca das a dud eseter duse epus i ncdE s ee RD LE bep 16 3 1 4 Add another measurement session to A CMG datafile
123. t value that matches an elementary time base multiple Similarly it is not possible to recalculate noise indicators according to a step that is smaller than the acquisition time base Partial Leq The Partial Leq is an equivalent sound pressure level of a specific noise source over a selected time portion The partial Leq is related to the duration of each period and is calculated regardless of sources duration The option Partial Leq is activated only when a time history plot is displayed according to a base plot step greater than the acquisition time base By statutory periods Displays the chosen values according to the statutory periods defined in the command Preferences Statutory periods chapter 10 The plot displays then one value per statutory period in the studied period Example If studying a signal over one week and selecting Night 22h 8h as statutory period the plot displays only 7 values per channel see dialog aside This function is useful for long term monitoring measurements as the Concatenation function in the measurement session paragraph 3 1 12 Bi B4 T ge 55 5 ful fiz B Sources Remaining sources Not coded Select in a list the noise sources to consider or not for the plot If one wish to display noise sources box Y N ticked on the plot they will be shown in different colours in order to differentiate them from the rest of the data The option Remaining sources allows
124. ta flows or parallel measurements that correspond to events acquired simultaneously to the main data flow such as multispectra detailed time histories resulting for example of the analysis of an audio record A navigation tool bar allows the user to switch between data flows with a simple mouse click Refer to paragraph 3 2 for more details Analysis of audio records script server option The analysis of audio records is not done any more in external application software dBAUDIO in the 16 bit software versions but with a script server On top of the traditional frequency analysis in octave and third octaves bands averaged spectrum over the duration of the audio event the script server may be configured to calculate for each and every audio signals the spectrum and or the multispectrum i e spectrum time history in 1 6 1 8 1 12 1 16 1 24 and 1 48 octave bands for example Analysis scripts can be applied to a set of audio records in a simple manner Refer to chapter 13 for more information CHAPTER 1 INTRODUCTION TO DBTRAIT 32 PAGE 12 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 2 DATA PROCESSING IN DBTRAIT32 2 1 Analysis capabilities The dBTRAIT32 software package processes noise data saved in a measurement session datafile with extension CMG A CMG datafile is a specific data format developed by O1dB to store the time histories of any type of noise quantities and the audio signals It can be constituted of several c
125. take up several pages 12 2 3 Set of files results The results are sent to two types of file Listings to text files ASCII and graphics to metafiles Window formats Due to their simplicity the text files can be grouped in agglomerate listings This option allows the user to dispose of the same information to a number of lower files For separate listings one file will be created for each listing which can be used for macro commands in spreadsheets or text processors CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 74 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL The rules for the filenames are shown below Anew sub directory is created in the data directory It carries the name of the script file For example if the file to be processed is located in the directory C 01DB CMG and the selected script is ALPHA FAS the results will be stored in the new directory C 01DB CMG ALPHA The files containing graphical results carry the CMG filename with the incremental extensions from TOO T for Trace followed by two digits starting from 00 For example if a time history and an amplitude distribution make part of the ALPHA FAS script applied to the files TOTO CMG and TATO CMG of the C 01DB CMG directory the files O C 01DB CMG ALPHA TOTO TO00 will contain the time history of the TOTO CMG file Q C 01DB CMG ALPHA TOTO TO1 its amplitude distribution QO C 01DB CMG ALPHA TATO TOO the time history of the TATO CMG file QO C 01DB
126. ter hard disk into a single datafile called measurement session CMG which stand for measurement campaign in French It replaces the LEQ datafiles for noise levels and spectra and the WAV datafiles for audio records of the 16 bit versions of 01dB software Please refer to the getting started user manual of your measurement system or the help file for more information on the data file format of a measurement session file Noautomatic datafile save Unlike the 16 bit version dBTRAIT32 does not automatically save data into a measurement session CMG after a processing operation has been performed by the user Use the command File Save or File Save As to save a measurement session file Refer to paragraph 3 1 7 for more information 32 bit operation long file names icons captions Because of the 32 bit software environment the user has now access to the following functions Captions When the user places the mouse over an icon a caption is displayed with a short text that describes the command associated to the icon Long file names The name of the measurement session CMG files can now be made of up to 25 characters CHAPTER 1 INTRODUCTION TO DBTRAIT 32 PAGE 11 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Dataflow primer In a measurement session file opened in dBTRAIT32 we find The main dataflow that corresponds to noise data measured over the complete duration of the datafile The complementary da
127. the configuration dialog box the audio data analysis may be started in dBTRAIT32 by different commands Multiple processing from the Aux menu Use the command Aux Frequency analysis amp advanced processing Run Another dialog box is displayed on screen Simply select the audio recordings to process in the given list To stop the process use the command Aux Frequency analysis amp advanced processing Abort Single processing from the time history plot Use the commands described in the paragraph 4 5 CHAPTER 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION PAGE 81 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 13 1 How to define and configure a script In order to define the list of processings to apply to audio records access this dialog box command Aux Frequency analysis amp advanced processing Configure in dBTRAIT32 and Audio Analysis Configure analysis key scripts edition in dBTRIG32 1 2 3 4 Script configuration script name Designation Available processings Active processings Broad band spectrum 4 Undersampling Overall level Remove Comments j Broad band spectrum ds UK mj Cancel 5 6 7 1 List of available processings it shows all the types of processings compatible with the software packages dBTRIG32 and dBTRAIT32 The same operator can be used several times with different parameters to process the same audio recording 2 Designation give a na
128. the first section of the file Display the previous section of the file Display the next section of the file Display the last section of the file Display th t ding to th OUL ISP ay e spectrum corresponding to e cursor Display Hide the overload bar position Ed Display Hide the audio bar Display Hide the spectrum bar Display Hide the comment bar measurement bar These commands are also accessible by the Time history menu activated when the active window is a time history or by clicking on the time history with the right mouse button 4 3 1 Set up graphical display parameters Set up the graphical display parameters by clicking on the icon or by using the command Time History Configure plot The plot is updated immediately when a modification is made Each plot has its own settings dialog box a modification on one plot does not affect the settings of another plot Display or not X axis scale and set shift percentage Display or not the Y axis scale and select the graph dynamic range constant range or set up manually the minimum and maximum limits for dynamic curves not used in dBTRAIT 3 r Eursor s JC e g W Show Constant range Value M arous His p Min 40 0 F Shaw Grid NUS m 1 s Biginiiei Iv Info bars RI M Legend E E Max 110 0 oom a In 3 NT Display or not a grid on the plot the information bars and the key labels for
129. tion option Comments This analysis results in a broad band spectrum ranging from octaves to 1 48th octaves with time history capability broad band multispectrum The Detailed time history A C and Lin user may either use digital filtering Class O 1EC1260 or FFT synthesis le Cancel Da rallel several time constants Fast Slow Impulse etc using very small time step option WI Decimation undersampling or deletion of audio records to optimise audio storage capacity on the PC hard disk For each type of processing click on the Edit button to define the parameters of the analysis Once the script is launched and the audio files selected each analysis will be carried out sequentially and automatically The configuration and operating process of audio record analyses are dealt with in chapter 13 4 5 2 Run analyses Audio record analyses can be run in dBTRAIT32 by different means Directly from the time history plot display with a cursor en To do so display the audio bar by clicking on the icon Tt is then displayed below the plot Move the cursor on the audio event to analyse as shown Click on the icon gt The audio signal is then processed by the script server in the background and 10 according to the configuration parameters u F Ve If the active cursor is not placed on an audio event the processing button cannot be accessed b When the audio records have been processe
130. to each acquisition platform The drivers establish a communication protocol between the computer the software module and the acquisition unit The programme files also contain the software help files CHM By default they are located in C PROGRAM FILES 01DB PROGRAMS The drivers of the acquisition cards are located under C WINDOWS SYSTEM Parameter files These are initialisation and configuration files containing the measurement parameters the list of characteristics of the different measurement chain elements and the measurement chain configurations of different applications for example These files are also located in the same directory as the programmes but are not delivered with the installation CDROM When the acquisition software is first used a file is created to save the essential parameters If this file is destroyed it will be necessary to configure the software and hardware again See the sketch below Data files These files contain the measurement results They can be located anywhere on the computer hard disc A directory C V MY DOCUMENTS 01DB MEASUREMENT SESSIONS is created by default For users that have evolved from a 01dB measurement system running with 16 bit applications to a system running with 32 bit applications the format of data files has evolved The files can be imported with the command File Import in the measurement software To avoid deleting everything by mistake we advise not to put the m
131. to modify the calculations parameters for example The icons of listing window toolbar allows the user to perform the following information Change the listing parameters Activate or not the automatic window resizing operation when the contents have changed CHAPTER 8 TABLE OF RESULTS PAGE 60 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 8 2 3 Counting sources Use the command Display Count to count the number of times sources appears in the measurement datafile The following dialog box appears on screen Select the datafile channel for which calculations will be made Select the time portion of the data file to consider list of events Channel Sources Chanel Type wot ME Croix Pusi Leg A Car Crom Pusi Peak Lin d Crois Pusi 20Hz Lin PI aing Croix Pusi 25Hz Lin se Craw Piet 21 Hs i Duration of an event Start r A Coding limits Ad HHH 07 41 01 0771171997 A HoH In Max 1042 End TTE n 00 23 07 11 1387 A v3 tems Iv Calculation by 1s steps v Leq v Max Iv Hour of Max ERE Cancel Au Select the sources in the list Select how the event duration is calculated Quantities to compute for each type of event The duration of any particular event can be considered in two ways either the duration of the coded event coding limits or the duration corresponding to the Max level 10dB This max level is either the maximum level it self or the Leq 1s corresponding value
132. ts is displayed in a new window on validation by OK An example is given below Ui Leq by periods PUSIGNAN SATOLAS CMG BE PUSIGNAN SATOLAS CMG ocan rox Pus Weighting A Start 07 11 97 07 30 00 End 07 11 87 11 30 00 Period 3m Parad stat pes uris Uns Sabe 59 8 56 0 Bo uo i5 jJ OF 19 07 30 00 5 4 077117 08 00 00 54 7 11 97 08 30 00 54 5 7 11 97 09 00 00 595 0771177 09 30 00 50 6 077117 10 00 00 524 7 11 97 10 30 00 55 5 OF 19 11 00 00 553 Overall e op Sl fall 13 400 421 43 1 488 537 541 552 The table of results features a toolbar with icons that allows the user to modify the calculations parameters for example The icons of listing window toolbar allows the user to perform the following operations Change the listing parameters Activate or not automatic window resizing operation when the contents have changed CHAPTER 8 TABLE OF RESULTS PAGE 54 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 8 1 3 Leq and statistical indices by statutory periods The statutory period s options are used to make calculations of various acoustic parameters within fixed daily or weekly periods These calculations are intended for use with long term CMG datafiles Let consider a one week long measurement file They are enough data in it to calculate the global day noise level say from 8 am until 8 pm over the whole week or only during working days or day by day To do so
133. u The overload and underload may also be displayed icon if overloads or underloads occurred at the time of measurement The information bars are only accessible if events occurred If for example no audio signal was recorded at the time of acquisition the audio bar icon is greyed If no audio record has been analysed the other bars will be greyed 4 3 4 Edit and display comments It is possible to insert a comment with the icon in the time history plot The comments may be used for example to describe the measurement conditions weather conditions emplacement of microphone etc To insert a command Place both cursors of the plot on the considered time portion m Click on the icon Le Input text in the comment dialog box Display the comments on screen by double clicking on the event in the comment information bar or use the command Time history Display Comment The comments are used as a notepad and are stored within the datafile This is useful when the user wishes to exploit again old measurement results and if the hand notes made at the time are lost CHAPTER 4 TIME HISTORY PLOT PAGE 29 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 4 4 Playback an audio record Aux menu When audio signals have been recorded at the time of acquisition it is possible to play them back through the computer sound system Audio replay can be achieved in various ways Directly from the time history plot display uU To
134. with a passband of 20 kHz The equivalent sound pressure level measurements are integrated over a time period of 500 ms Frequency pass decimation decimated file band Hz factor sizes kilobytes 20000210000 0 1001 10000 5001 10002 639 original size of the file minimum size To playback decimated audios file unless the same hardware is used for recording and playback of the audio signal some problems may be encountered This is due to the sampling rate of standard multimedia cards 44 1 kHz standard which is inferior to SYMPHONIE system when a 20 kHz passband is chosen f 51 2 kHz A file decimation factor of at least 2 will be used to play them back on a standard multimedia card The minimal undersampling passband for O1dB hardware is 1414 21 Hz Any signal decimated below this frequency cannot be played back Typically a 2 kHz cut off frequency is also the minimum required to accurately identify events in environmental noise CHAPTER 13 ONLINE ANALYSIS OF AUDIO RECORDS OPTION PAGE 85 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 14 HIDDEN FUNCTIONS OF DBTRAIT32 In dBTRAIT32 there are two hidden functions that set the resolution of statistical indices Leq and Ln andsetthe parameters for counting sources events These parameters can only be set in the Settings section of the dBTRAIT INI file They cannot be accessed directly by a software command 14 1 Statistical indices
135. works The weighting networks used in acoustics have been defined from the basic research of Fletcher and Munson in 1933 The goal of the study was to determine the influence of the human ear as a function of frequency and level From these studies the Equal Loudness contours have been defined They were the basis of the weighting networks definition The aim of the weighting networks is to provide a level as close as possible to subjective perception as they integrate the human ear attenuation and hence describe the subjective impression of a noise The A network corresponds to the sensitivity of the human ear at low levels the B network to medium levels and the C network to high levels In the field of environmental noise for instance most measurements are performed using the A network The A weighting is the network which correlates the best with the human ear It attenuates both low and high frequencies and magnifies the frequencies around 2 kHz the frequency range where the human ear is the most sensitive The C weighting looks much like the A weighting at high frequencies and is flat in frequencies below 1kHz The table and curves below describe the various networks 16 4 1 Comparative curves of the usual Weighting Networks Networks COO CLERC eed CEPT LIT eee eee TIL CCE lat a ooo IU TNICTUXETN am am zz Lm ia 2 x l l l I l I I Co CO CT BL co ra a OO oo co Frequency Hz A n
136. x Nr Teen EUR Pe Fo nk eee ene es Ys 69 11 1 PRINTING RESULTS senses vaccis ten poe LA P eee i rod setenv pads ag ei ricco o tid omo eee ti ote p cete o LO eee ae 69 11 2 EXPORTING DATA TO A SPREADSHEET AND WORD PROCESSORS sscccccecceceeeeeeeesesssssncceeeeeeeeeeeeeeesesssssaaeaneeeeeeeeeeees 70 13 PRINCIPLE OF THE COPY PASTE OPERATION OF A TIME HISTORY PLOT ceeeeeeee teen eene nennen nennen enn nnnes rennen ene 7 11 4 CUSTOMISATION 4OEDB IRANS arimei anaE ib Ch eet tue desii oe Glo eese ian fuco cese E 22 17 AUTOMATIC PROCESSING OP TION iiteeeseeevan euvuke a duae aye Ehe ow Y QURE nu kot EnS S A FRE ra No PEOR Op ONERE NER E E UE Opa 73 12 1 SCRIPT CAPTURE nod sa abt Recette Metodi cbe mid ec aod EE td usd tees vd re LI MM aca ivedan Ed EM UE 73 12 2 LAUNCHING OF AUTOMATIC PROCESSING exeo deed detta turo De datio tr ie mapu dates a due le Sd LI dla UE 74 12 24 Sumilgton display On the Sreet suceso e tia tt el t n a aah till dus el et s ete c eleva t e Lat 74 22a PEE 277 PEU 74 12 2 95 SOL OL TIE POSTS dtu att eii teta ie eb taie eee o Otic s oM dta is eMe dep Ld La 74 12 3 PROCESSING BROGRBSS 25 stet indu ete DM E MEDI E IM e LM sc M uM a UM IM IL IE 76 1234 heg stanstical indices privileged ODOFOLlUO e oi t vet i t v vb cei bv ve etd b e tvi e opt if 12 4 RESUMPTION BY SPREADSHEET OR WORD PROCESSORS 252 edhe peat daft cou ento edt dunno detected e secu UU M neds 78 I2 AR CSUPADULOI Of erapl FeSul
137. ximum threshold of 80 dB minimum event duration of 1 second and maximum event duration of 10 seconds usually defines a car pattern Source Identification Using Threshold Select the data type for which the Channel to compare to threshold Source uu threshold criteria Channel Type wi T RE a inp ae will be applied fascales Lea EUM HE fenik in the list P Cascales Peak Lin MM CU a ese Cascales 20Hz Lini ae Cascales 25H Lin Cascales 41 AH i Code 8 af Select the Coding domain New lisan Definition of a channel to code cod new type of when the criteria Hame noise source are fulfilled name and code number Threshold dB Select the datafile rn feo time portion to Start Min fen Max 80 Enter the eee 10 02 31 000 20 04 1398 threshold coding conditions Pode 10 Event duration s End 16 42 54 000 e004 21998 Min Max 120 Complete file Enhancement s Canes see ata m i First select the channel to compare to the threshold conditions The software will scan through the data contained in this channel and look for a time portion that fulfils the threshold criteria In the field Coding domain select all the measurement channels for which the data will be coded when the threshold conditions are fulfilled It is possible to define a new type of noise source or to select an existing type of source in a list as before It is also possible to load noise sources that have been previously defin
138. y CMG data file and by script operation The only difference is the first letter of the extension an L for Listing replaces the T for Trace The names of the result files are in this case independent of the name of the script file For example if the listings Leq and Statistical indices and Statutory periods make part of an ALPHA FAS script applied to files TOTO CMG and TATO CMG in the directory C 01DB CMG the files C 01DB CMG ALPHA TOTO LOO will contain Leq and Ln indices of the TOTO CMG file C 01DB CMG ALPHA TOTO LO1 Statutory periods of the TOT CMG file C 01DB CMG ALPHA TATO LOO Leg and Ln indices of the TATO CMG file and C 01DB CMG ALPHA TATO LO1 Leq by regulated periods of the TATO CMG file LDODL CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 75 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 3 Processing progress Once the processing parameters have been defined dBTRAIT32 opens one by one the files of the selected set and applies one by one the script operations A special window follows the processing B summary IP xi E File demob FAS I BALS CMG Display Time history OK Operation OK BALS CMG Display Leg and Ln OK Operation OK BALIO CMG Display Time history OE Operation OK BALIO CMG Display Leg and Ln OK Operation OK BAL CMG Display Time history OK Operation OK BALA CMG Display Leg and La OK Operation OK BALS CMG Display Time
139. ysis of a CMG file This file should be representative of the set of files to analyse The first operation of a script capture is therefore opening a CMG file Activating the script capture mode Selecting the command Automatic Processing Script in the Preferences menu does it The Editing Script window is then displayed onto the screen At first it indicates that the number of script operations is zero Defining the script operations The definition of the script contents is made as the current CMG file is processed All of the operation parameters are memorised and a new line is added to the window after each operation For example after a spectral time history plot and overall Leq table listing the window displays the following information Time history Leg and Ln Ending the capture procedure and Saving the script Clicking the window OK button ends the script capture The operator can then save the script in a file with FAS extension The filename choice obeys all the usual Windows rules The script is saved and is then ready to use CHAPTER 12 AUTOMATIC PROCESSING OPTION PAGE 73 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL 12 2 Launching of automatic processing The Automatic Processing command in the File section launches the processing Opening a CMG file beforehand is not necessary The dialogue box to select the analysis parameters is shown below Automatic processing Multiple sel
140. z quantities to plot Ease plat stem kimine noc nnnannnasmon A Bo Display or not time Partial led Leg Between cursors history per statutory periods Rem mating SOU EES Set the dynamic range of the Y axis v Per statutory periods Vad eek erd The following parameters may be defined Channels The acquired acoustical quantities stored in a CMG datafile that can be plotted For each measurement channel different types of noise data can be available A maximum of six channels can be displayed simultaneously on a time history plot E Start End Specify the beginning and end time to plot between The format of this selection is hh mm ss ms dd mm yy The icons Hea Lt and allows the user to respectively select the complete file that is noise data over the complete measurement duration the plot section in between cursors and go back to the previous selection CHAPTER 4 TIME HISTORY PLOT PAGE 25 DBTRAIT32 SOFTWARE PACKAGE USER MANUAL Base plot step The plot may be displayed using the default time base of the acoustical quantities in the datafile or a greater time base During acquisition an elementary time base has been used to store the short Leq data usually 125ms or 1s It is possible to recalculate noise levels according to a greater time base for example 15 min that is a multiple of the default integration time dBTRAIT32 adjusts automatically the base plot step to the neares

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