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User Manual: Building Acoustics Software BZ-7228

1. 2 cccccceeeeeeeeeeeeeeeeeeneeeeeneees 5 Field vs Laboratory Measurements eeeeeee 5 Frequency Range 1 84 Frequency Weighting Parameters 84 Function sti aide a ee ae 34 Function Selector ccccescceeeeceeeeeeeeeeeeeeeeeeeeeeeeaeees 19 G Generator for L1 and L2 Parameters s e 88 Generator for T2 Parameters seee 89 Generator Setup for L1 and L2 29 Generator Setup for T2 Geometry Ainaa enna Ea a E RE H Hardware Setup ceseeecceseeseeeeeeeeeeeeseeeaeeseeeeeeaee 15 How to Use this Manual BGGIMMGIS aea riar A raa AA Piane ARE erei sate 2 Experienced USers sssssesersssssrsresnrerrsarrnssnasrnsenne 2 l Icon Annotations starne 20 Commentary svscicsiccet a dindenaeacnee est 20 IMAGOS ese cetaveiie cate areesvaldel deuneaitiienciaawsnedsd 66 Impact Sound LeVel ccecceeeeeeeeeeeeeeeteeeteeees 3 12 Impact Sound Level Measurement Input Selections Type 2270 only Interrupted Noise Method eee eee Introduction orei eiea eanais a Introduction to Building Acoustics SO 140e ii L la E E E E A E E 4 L1 and L2 Simultaneously Type 2270 Only ccccecceecceeeeeeeteeeeeeeeteeseeeenaeeeees 54 L1 amp L2 Function cece cccceeccesteeeeeeeseessseeeeeeeeeeeeees 17 Level Measurements L1 L2 and B2 25 Level Trigger Parameters 0 cece eeeeeeeeeeneeeeee 87 Logged Broadband 100 ms Parameters 87 Logged Spectr
2. Status P 7 ar Smile Explanation Description Code y P P i 5 L1 or L2 not both measured Make sure all positions in L1 and L2 are measured serially serially S 5 Not all positions measured serially Make sure all positions for the function are measured serially L amp No ISO 16283LF project is found Ensure that the Calculations gt LF Project value is correct An ISO 16283LF project is found Ensure that the Standard requirements have been but the data are incomplete met see section 4 6 The L1 and L2 ISO 16283 The ISO 16283 or ISO 16283LF measurement Generator parameter is different must be remade with the correct Generator from the ISO 16283LF parameter parameter value If there is no status code there is no smiley If any one of the status codes there may be several requires a red smiley the red smiley will be displayed If any one of the status codes requires a yellow smiley but no red smiley the yellow smiley will be displayed The explanation is shown if you tap on a smiley see Fig 4 41 Please note Manual data input will overrule other smileys For the spectrum small smileys are shown below the relevant frequency bands Select the frequency band with the cursor and tap on the smiley in the cursor readout to see the explanation You can also view the spectrum table to get an overview of all the status codes tap the y axis and select Spectrum Table from the drop down menu see Fig 4 27 64 Buildi
3. 14 Press the Save amp pushbutton and the measurement is saved as 1 Pos1 The smiley is updated for the complete project on the upper line 51 Pos2 is automatically selected to indicate the next measurement position see Fig 4 38 L1 and L2 are selected again as they were before pressing the Start Pause pushbutton Fig 4 38 S1 Pos2 automatically selected to indicate next measurement position BUILDING A 100 Hz 100 Hz ik 4h mm 250 Ch 2 LAF Preset Time 10k AC 78 1 dB 00 00 10 Spectrum CHAPTER 4 Building Acoustics Software 15 Press Start Pause pushbutton to measure in sequence at Pos 2 Pos 3 etc sy The selection possibilities for spectrum parameters in a Planned measurement are listed in Table 4 3 sai Function Upper Graph Lower Graph parameters Result display L1 amp L2 Ch 1 LZF Ch 2 LZF B2 T2 LZF LZF L1 amp L2 L1 Pos L1 Pos L1 amp L2 L2 Pos L2 Pos B2 B2 Pos B2 Po T2 T20 Pos T20 Pos T2 T30 Pos T30 Pos L1 amp L2 B2 L1 L1 L1 amp L2 B2 L2 L2 L1 amp L2 B2 B2 B2 L1 amp L2 B2 L1 L2 L1 L2 L1 amp L2 B2 L2 B2 L2 B2 L1 amp L2 B2 T2 Off Off T2 T20 T20 T2 T30 T30 4 8 4 8 1 Building Acoustics Software BZ 7228 User Manual The position selector has the following options available for L1 as well as L2 e 1 Posl e 1 Posl e 1 Posl e 1 Posl e 1 Posl e 1 Posl The
4. indicates unsaved data in this example for 52 Pos1 Measuring Two Positions Simultaneously in the Same Room To speed up the measurement process you can measure two positions channels simultaneously in the same room Set the required Input for L1 L2 B2 and T2 parameters to Ch 1 and Ch 2 Then the measurement process will be the same as for single channel measurements except you measure and save data for two positions at a time While measuring the displayed instantaneous spectra will be Ch 1 LZFand Ch 2 LZF The measured but not saved data will be displayed as two consecutive positions the first time it will be S1 Pos 01 and 1 Pos 02 for planned measurements and Pos 01 and Pos 02 for unplanned measurements When you press the Save amp pushbutton then two consecutive positions will be updated data from Ch 1 at the position you have selected and data from Ch 2 at the subsequent position Displaying Results Measurement results are selected using the link in the Status Field Line 3 There are two displays one to get an overview of the measurement results and one for calculation results including a spectrum Overview The Overview tab displays all the results of measurements in the project see Fig 4 39 It is possible to include or exclude measurements get details on smileys and view annotations CHAPTER 4 59 Building Acoustics Software Fig 4 39 oe View
5. 2 1 5 Spatial Averaging The averaging of levels in a room may be done using a moving microphone for example mounted on a rotating boom suchas Type 3923 or by averaging the levels measured in a number of positions The average reverberation time in a room is calculated from the average result for a number of positions either by averaging the reverberation times or by averaging the decay curves and then calculating the reverberation time for the average decay ensemble averaging 2 2 Measurement Procedure 2 2 1 Standards Hand held Analyzer Type 2250 2270 with BZ 7228 software or Type 2270 with BZ 7228 and BZ 7229 software can measure and calculate results according to a wide range of national and international standards which include e ISO ISO 16283 and ISO 140 international SS Sweden e DIN Germany e NORM Austria e BS UK e BREW England Wales e Sia Switzerland e UNI Italy e NF France e NBE Spain e CTE Spain e NEN Netherlands e NEN 06 Netherlands e ASTM USA Further details of these standards can be found in Appendix B Table B 1 For practical reasons instructions will be given for the ISO standard which in many cases forms the basis of national standards CHAPTER 2 7 Building Acoustics Measurements 2 2 2 Airborne Sound Insulation Airborne Sound Insulation is calculated from the Lzeq spectra for the average source room level L1 average receiving room leve
6. Immunity for industrial environments EN IEC 61326 Electrical equipment for measurement control and laboratory use EMC requirements IEC 61672 1 IEC 61260 IEC 60651 and IEC 60804 Instrumentation standards Note The above is only guaranteed using accessories listed in this Product Data Temperature IEC 60068 2 1 amp IEC 60068 2 2 Environmental Testing Cold and Dry Heat Operating Temperature 10 to 50 C 14 to 122 F Storage Temperature 25 to 70 C 13 to 158 F Humidity IEC 60068 2 78 Damp Heat 93 RH non condensing at 40 C 104 F Recovery time 2 4 hours Mechanical Non operating IEC 60068 2 6 Vibration 0 3 mm 20 m s 10 500 Hz IEC 60068 2 27 Bump 1000 bumps at 400 m s IEC 60068 2 27 Shock 1000 m s2 6 directions Enclosure IEC 60529 1989 Protection provided by enclosures IP44 With preamplifier extension cable or protection plug connected to the top socket and the hinged cover protecting the bottom connectors 80 Building Acoustics Software BZ 7228 User Manual a Appendix A Setup Parameters This appendix describes all the setup parameters included in a template The parameters are applicable to Types 2250 and 2270 unless otherwise stated 82 Building Acoustics Software BZ 7228 User Manual A 1 Input For Type 2270 Only Table A 1 Input parameters Parameter Values Comment Measure L1
7. Lock Keyboard and touch screen can be locked and unlocked USB INTERFACE Hardware Versions 1 to 3 USB 1 1 OTG Mini B socket Hardware Version 4 USB 2 0 OTG Micro AB and USB 2 0 Standard A sockets MODEM INTERFACE Connection to Internet through GPRS EDGE HSPA modem connected through e Compact Flash slot hardware versions 1 3 e USB Standard A Socket hardware version 4 Supports DynDNS for automatic update of IP address of host name PRINTER INTERFACE PCL printers Mobile Pro Spectrum thermal printer or Seiko DPU S245 S445 thermal printers can be connected to USB socket MICROPHONE FOR COMMENTARY Microphone which utilizes Automatic Gain Control AGC is incorporated in underside of analyzer Used to create voice annotations for attaching to measurements CAMERA TYPE 2270 ONLY Camera with fixed focus and automatic exposure is incorporated in underside of analyzer Used to create image annotations for attaching to measurements Image Size e Hardware versions 1 3 640 x 480 pixels e Hardware version 4 2048 x 1536 pixels Viewfinder Size 212 x 160 pixels Format JPG with exif information LAN INTERFACE SOCKET Hardware Versions 1 to 3 Type 2270 only e Connector RJ45 MDI e Speed 10 Mbps e Protocol TCP IP Hardware Version 4 Types 2250 and 2270 e Connector RJ45 Auto MDIX e Speed 100 Mbps e Protocol TCP IP INPUT SOCKET 2 TYPE 2270 ONLY Connector Triaxial LEMO Input Impedance
8. e AQ 0673 Speaker Cable speakON 4 pin M to speakON 4 pin M 10 m 33 ft Note Flight case KE 0449 for OmniPower sound source must be purchased separately e KE 0364 Carrying bag for Type 4292 L Tripod e UA 0801 Tripod for Type 2250 CHAPTER 5 Specifications BZ 7228 300 Building Acoustics Kit for single channel airborne or impact sound insulation including the same items as BZ 7228 200 and e Type 3207 Tapping Machine e UA 1477 Battery Kit for Type 3207 Type 2270 users not Type 2250 users can upgrade a BZ 7228 200 or BZ 7228 300 kit to perform 2 channel building acoustics measurements with a combination the following accessories depending on your measurement scenario e BZ 7229 2 Channel Option e Type 4189 Prepolarized Free field Microphone e AO 0697 D 100 Microphone Extension Cable 10 pin LEMO 10 m 33 ft e AR 0199 Flat Cable 10 pin LEMO 0 5 m 1 64 ft e JP 1041 Dual 10 pole Adaptor Cable e UA 0801 Lightweight Tripod e UA 1317 2 Microphone Holder e ZC 0032 Microphone Preamplifier For help determining the type and quantity of required accessories please contact your local Briiel amp Kj r sales representative Software and Accessories Available Separately SOftware Modules BZ 7228 Building Acoustics Software for Types 2250 and 2270 BZ 7228 100 Upgrade of BZ 7227 Reverberation Time software to BZ 7228 Building Acoustics Software BZ 7229 2 channel Option Type 2270 BZ 7223 Frequency An
9. 9 amp lt a rn Measurement ISO DIN NORM UNI BS BREW SS Typical R R DnT Dn air DnT i Parameters L n L n L nT Ln L nT L n EN EN EN Lab 10140 2 aan ates 5101 8270 1 0140 3 20140 3 A 140 4 EN Airborne Field 16283 1 52210 1 5100 1 8270 4 2750 4 BREW 20140 4 EN Fa ade 140 5 52210 5 5100 3 8270 5 2750 5 20140 5 E EN Lab 10140 3 52210 1 5101 8270 6 2750 6 20140 6 Impact A 140 7 EN Field 16283 2 52210 1 5100 2 8270 4 2750 7 0140 7 RT 3382 2 52212 5821 1 BS EN SS i Airborne 717 1 52210 4 5100 1 8270 7 3 717 1 ISO 717 1 Rating SS Impact 717 2 52210 4 5100 2 8270 7 5821 2 ISO 717 2 Partially fulfilled 96 Building Acoustics Software BZ 7228 User Manual Table B 2 Building Acoustics Standards Part 2 ge 5 g 5 lt oO 5 a E 2 N a Measurement Sia NF S31 NBE CTE NEN NEN 06 ASTM Dn Typical if DnAT DnAT DnT A llu DnTA FTL Parameters in LnAT LnAT Lar Ico LnT A Ln T Lab 051 74 040 84 3 CTE 2008 Field ie 054 74 040 84 4 CTE 2008 5077 5077 336 90 Airborne 1 057 Facade Pi ee 74 040 84 5 CTE 2008 5077 5077 966 90 Lab 052 74 040 84 6 CTE 2008 Impact Field Pe pie 74 040 84 7 CTE 2008 5077 1007 11 RT 5077 5077 F 18 NPR E413 73 Airborne 3 057 NBECA 88 CTE 2008 5077 es A Rating Impact a 057 NBECA 88 CTE 2008 5077 E989 Table B 3 Calculated Parameters Part 1 APPENDIX B Measurement Pa
10. Building Acoustics Software BZ 7228 User Manual A 3 Standard Table A 3 Standard parameters Parameter Values Comment Standard ISO 16283 ISO 16283LF SS DIN ONORM BS BREW SIA UNI NF NBE CTE NEN NEN 06 ASTM ISO 140 Task Airborne Impact Fa ade A 4 Frequency Range Table A 4 Frequency Range parameters Parameter Values Comment Bandwidth 1 1 octave 1 3 octave Bandwidth of frequency analysis Bottom Frequency 50 Hz to Top Frequency 1 1 octave 63 Hz 8 kHz 1 3 octave 50 Hz 10 kHz Please note The settings of Bottom and Top Frequency control the frequency range of the frequency analysis and the internal noise generator Top Frequency Bottom Frequency to 10 kHz 1 1 octave 63 Hz 8 kHz 1 3 octave 50 Hz 10 kHz The Frequency Range parameters are automatically set in accordance with the chosen standard however the range can be set wider than that required by the standard APPENDIX A Setup Parameters A 5 Measurement Control L1 L2 and B2 Table A 5 Measurement Control L1 L2 and B2 parameters Parameter Values Comment Planned Off For Planned Measurement 07 you can define the Measurement On number of source positions and microphone positions per source otherwise the measurements are made from Pos 1 and forward No Of Source 1 to Only for Planned Measurement On Pos
11. LANGUAGES English French German Italian and Spanish VIEWS Result Level Views A collection of views showing the resulting single values reduction curve and underlying average curves L1 L2 B2 and T20 T30 Average Level Views Each of the parameters L1 L2 and B2 has a corresponding view showing all of the measurement curves included in the average calculation and a view of the resulting average curve In T20 T30 Average mode it is possible to see all of the T20 T30s included in the average calculation In Ensemble Average mode it is possible to see the averaged 3D and averaged single frequency decay curves Both modes gives the user the ability to see the resulting T20 T30 spectrum Position Level Views Each of the level measurements L1 L2 and B2 can be viewed as a spectrum In addition the T2 reverberation measurement can be viewed as 3D multispectra and as single frequency decay curves Furthermore it is possible to see the calculated T20 T30 spectrum Data Sheets All of the measurement and the most relevant intermediate and final results can be viewed as values in a table not decays CURSOR READ OUT All curves have cursor read out Building Acoustics Software BZ 7228 User Manual MANUAL INPUT Allows graphical input and modification of the regression line in reverberation decay curves Calculated sound reduction curves can also be adjusted graphically The impact on the single value index is shown simultaneousl
12. Smile Explanation Description Code y P P Decay is bent The difference between T20 and T30 is greater than 10 Recommended quality indicator from ISO 3382 2 Annex B k 5 Decay is non linear Correlation coefficient in linear regression is too low less than 0 005 or amp Xi gt 10 b amp Background noise correction used Background noise correction used m E Affected by manual input Reverberation time entered by user G 5 Receiving room volume limited in Used on the SS standard only calculation H E No B2 measurements available No B2 measurements available a amp L1 gt 6 dB difference to adjacent Try other source or microphone positions or band change the optimisation of the frequency response for the internal generator Setup menu under Generator L1 and L2 Sound Source parameters or make Serial measurements Setup menu Measurement Control L1 L2 and B2 Level Measurement Mode and select the bands with a big difference for serial measurements see section 4 4 8 amp L1 or L2 High Standard Deviation The standard deviation in a frequency band is greater than twice the theoretical expected value s amp Measured serially The frequency band has been measured using band limited noise i E Ref Curve Increment 0 1 dB You should use Ref Curve Increment 1 dB when reporting results CHAPTER 4 63 Building Acoustics Software Table 4 4 Continued Overview of Status Indicators and Smileys
13. the next position will be selected when starting the next measurement Type 2270 2 channel Setup e Assign different transducers to the two channels to ensure correct operation This also applies to Direct inputs Microphone icons the left icon is Ch 1 right is Ch 2 Measuring L1 and L2 simultaneously Setting Setup gt Input gt Range Setting to High Range for L1 and Low Range for L2 works for most measurements Incase of Underrange indication during the averaging time High Range only change to Low Range Or use Autorange which takes a few extra seconds Ll is Ch 1 and L2 is Ch 2 You may want to reassign B2 and T2 to Ch 2 If you change Setup gt Input gt Measure L1 and L2 to Separately ensure that the channel assignments are as desired 2 channel L1 amp L2 Overview L1 or L2 shown click on L1 to see 2 and vice versa CHAPTER 4 95 Building Acoustics Software e Measuring two positions channels per function Select Ch 1 and Ch 2 as Input for the functions L1 2 B2 and or 72 Setting Setup gt Input gt Range Setting to High Range for L1 and T2 and Low Range for L2 and B2 works for most measurements Incase ofan Underrange indication during the averaging time High Range only change to Low Range In case of Overload indication during the averaging time typically Low Range change to High Range Or use Autorange which takes a few extra seconds Twoconsecutive positions will be updat
14. 1 25 kHz lt 1 25 kHz 1 0 gi m ee ili iii TT 0 0 50 500 ik 2k 3 15k 100 2 LCF 106 5 dB 4 2 8 Decay Tab T2 The Decay tab for T2 measurements shows the reverberation time decay from a position the average of positions if Setup gt Calculations gt Ensemble Averaging is set to Yes or both For more information refer to section 4 5 5 4 3 Building Acoustics Software BZ 7228 User Manual Things To Remember Display e e Smileys in the spectrum refer to the combined smileys of both selected spectra A useful selection of displayed parameters is L1 L2 B2 T2 L1 Pos L2 Pos B2 Pos T2 Pos You can then check the spectrum for the latest position as well as the average spectrum for any function For T2 measurements set Setup gt Measurement Control T2 gt Automatic Save to Off Reverberation Time e Reverberation Time Curvature C is displayed when Show Regression Line is selected from the Y axis drop down on the Decay tab When Setup gt Calculations gt Ensemble Averaging is set to Yes manual entry must be made in the average T2 spectrum in order to take effect When Ensemble Averaging set to No manual entry can be made in any spectrum Decay for the average T2 measurement is shown only with Ensemble Averaging set to Yes Measurement Control e After a Planned measurement the next position can be automatically or manually selected After an Unplanned measurement
15. T2 4 5 1 Setting up the Instrument This section assumes that you followed the procedure in section 4 4 so most default settings are already set up The following parameters need to set before performing T2 measurements 1 Set the Function Selector to 72 and check that the Standard and Task Selectors are still set as required see Fig 4 1 2 If you want to define the number of source positions and microphone positions per source tap Main Menu Eq gt Setup gt Measurement Control T2 gt Planned Measurement and select On see Fig 4 23 otherwise the measurements are made manually from Pos 1 onwards Fig 4 23 ae EE Measurement control Generator L1 and L2 setup for T2 Measurement Control T2 Planned Measurement on No of Sources Positions 1 No of Mic Pos per Source 3 Increment Mic Position First _ Automatic Save Max Decay Time Excitation orf 5s Interrupted Noise Number of Decays 3 gger Level L 80 0 dB ea Off T2 Measurement Mode Parallel y M Trig Building Acoustics Software BZ 7228 User Manual 3 Set No of Sources Positions parameter to the number of sound source positions you require for your T2 measurement Only available if Planned Measurement is set to On 4 Set No of Micr Pos per Source parameter to the number of microphone positions per sound source that you require for your T2 measurement Only available if Planned Measurement is set to On 5 Se
16. and L2 Simultaneously Please note If Task Facade and Generator Type Separately Off Traffic Noise then Simultaneously is the only option This parameter requires a BZ 7229 license Input for L1 Ch 1 Select input channel for LL measurements Ch 2 Ch 1 and Ch 2 amp Please note If Measure L1 and L2 Simultaneously then Ch 1 is the only option Ch 1 and Ch 2 Simult requires a BZ 7229 license Input for L2 Ch 1 Select input channel for L2 measurements Ch 2 Ch land Ch 2 S Please note If Measure L1 and L2 Simultaneously then Ch 2 is the only option Ch 1 and Ch 2 Simult requires a BZ 7229 license Input for B2 Ch 1 Select input channel for B2 measurements Ch 2 Ch 1 and Ch 2 Simult requires a BZ 7229 license Ch 1 and Ch 2 Input for T2 Ch 1 Select input channel for T2 measurements Ch 2 Ch 1 and Ch 2 Simult requires a BZ 7229 license Ch 1 and Ch 2 Autorange Off Set to On for autoranging Ch 1 and Ch 2 or set to Off for On manually setting the range This is relevant for Measure L1 and L2 Simultaneously or for Input set to Ch 1 and Ch 2 Simult requires a BZ 7229 license APPENDIX A Setup Parameters A 2 Input Table A 2 Input parameters Parameter Values Comment Input Top Socket Determines whether the input is taken from the top socket Rear Socket or the rear socket Input on connector panel Connect your transducer to this socket Please note Sound Field and Windscreen co
17. if you are measuring to the ASTM standard Only available if the Fa ade task is selected 31 To exit the Setup screen tap EJ CHAPTER 4 33 Building Acoustics Software Geometry Tab Geometry parameters Fig 4 15 can be set as required they are as follows Fig 4 15 Setup for Geometry Frequency Range d Measurement Control L1 L2 and B2 Generator L1 and L2 Measurement Control T2 Generator T2 Signal Recording Source Room Vol V1 75 0 m3 Source Room Floor Area 25 0 m2 Partition Area S 15 0 m2 Receiv Room Vol V2 75 0 m3 Receiv Room Floor Area 25 0 m2 P Calculations 32 Source Room Vol V1 the value you insert here which is optional is needed for reports in some standards and is a determinant for whether you need to do special low frequency measurements following the ISO 16283 standard see section 4 6 33 Source Room Floor Area the value you insert here which is optional is needed for reports in some standards 34 Partition Area S the value you insert here is used in calculation of results 35 Receiv Room Vol V2 the value you insert here is used in calculation of results and is a determinant for whether you need to do special low frequency measurements following the ISO 16283 standard see section 4 6 36 Receiv Room Floor Area the value you insert here which is optional is needed for reports in some standards 4 4 5 Controlling the Measurement Measurement is controlled
18. in the same way you would control a level measurement using Start Pause Continue Back erase and Reset pushbuttons see Hand held Analyzer Types 2250 and 2270 User Manual Chapter 3for more details The measurement control procedures for sound pressure level look very similar to those for measuring reverberation time see also section 4 6 The only difference between the displays is that the time units s are replaced by sound level units dB and the reverberation time average for example T20 is replaced by a sound pressure level average for example L1 The reverberation software also has an extra Decay tab which contains a Decay view see also section 4 6 34 Building Acoustics Software BZ 7228 User Manual In this section two examples have been used one to illustrate how to perform a planned measurement task and the other to illustrate how to perform an unplanned measurement task Changing Function You can change the function L1 L2 B2 or T2 at any time during the measurement sequence you do not have to follow a certain sequence if it does not suit you For instance you might want to do the L2 measurement before L1 or perform the measurements in a completely random order depending on site conditions 4 4 6 Example of a Planned Measurement Task The task is to determine the airborne sound insulation between two rooms according to ISO 16283 1 Connect the cables amplifier and sound source plea
19. internal generator output to the connected sound source The Flat setting optimizes the output for a flat power response and the Optimum setting optimizes the power difference between adjacent 1 1 or 1 3 octave bands while maintaining a boost at low frequencies Select a type matching your sound source Type 4292 or 4296 OmniPower Sound Source Type 4295 OmniSource Sound Source Select Unknown if you are using another sound source or do not want to correct the frequency response A 10 Geometry Table A 10 Geometry Parameters APPENDIX A Setup Parameters Parameter Values Comment Source Room Vol V1 0 1 to Needed for report in some standards and is 100000 m a determinant for whether you need to do special low frequency measurements following the ISO 16283 standard see section 4 6 Source Room Floor Area 0 1 to Used to determine quality of L1 10000 m measurements Partition Area S 0 1 to Used in calculation of results 1000 m Receiving Room Vol V2 0 1 to Used in calculation of results and is a 100000 m determinant for whether you need to do special low frequency measurements following the ISO 16283 standard see section 4 6 Receiving Room Floor 0 1 to Used to determine quality of L2 Area 10000 m measurements os 92 Building Acoustics Software BZ 7228 User Manual A 11 Calculations Table A 11 Calculation Parameters Parameter Values Comment L
20. ith this symbol when applicable Danger ignals an imminent hazardous situation which if ot avoided will result in death or serious injury ot avoided will result in death or serious injury Caution ignals a hazardous situation which if not voided could result in minor or moderate injury r damage to the apparatus S n Warning Signals a possibly hazardous situation which if n S a o Notice Signals a situation or practice that requires attention but does not directly result in personal injury if ignored Risks and Hazards Explosion Hazards Danger The apparatus is not designed to be used in potentially explosive environments It should not be operated in the presence of flammable liquids or gases Electrical Hazards A Warning Any adjustment maintenance and repair of the open apparatus under voltage must be avoided as far as possible and if unavoidable must be carried out only by trained service Caution Switch off all power to equipment before connecting or disconnecting their digital interface Failure to do so could damage the equipment Mechanical Hazards Caution Whenever it is likely that the correct function or operating safety of the apparatus has been impaired it must be made inoperative and be secured against unintended operation Waste Handling Br el amp Kj r complies with the EU s Waste Electrical A and Electronic Equipment WEEE Directive which issues the following
21. line CHAPTER 5 Specifications Readout of Curvature in Y axis Range 5 10 20 40 60 80 100 120 140 or 160 dB Auto zoom or auto scale available Result Displays OVERVIEW Table of measurement positions for all functions L1 L2 B2 or T2 with readout of quality indicators Positions can be included excluded from result CALCULATIONS Shows the sound reduction index spectrum and weighted according to the selected standard along with the reference curve if any or deviations from the reference curve See Table 2 on page 9 Measurement Control Measurement Sequence Supports measuring e at all microphone positions before using another source e at a microphone position for all sources before measuring at a new position e at subsequent microphone positions without source information e at manually selected source and microphone positions Measurements are started manually and can be automatically stored on completion of measurement Generator L1 L2 and T2 The noise generator is turned on and off automatically Escape Time 0 to 60 s Build up Time 1 to 10 s The generator can be turned on and off manually for checking equipment and sound levels EXCITATION T2 Interrupted Noise Measurements are started manually and can be automatically stored on completion of measurement Number of Decays per Measurement 1 to 100 ensemble averaged into one decay Impulse Manual start of first measurement When level
22. quality of the recording by adjusting the sampling rate Fair The amount of space required for the recording will depend on the Medium selected quality l Quality Sampling UpperMemory High freq freg 16 bit Low 8 kHz 3 kHz16 KB s Fair 16 kHz 6 kHz32 KB s Medium 24 kHz 10 kHz48 KB s High 48 kHz 20 kHz96 KB s Peak Recording 145 dB The recorded signal is stored as a 16 bit wave file which has a dynamic Level 135 dB range of up to 96 dB When playing back on Type 2250 the dynamic 125 dB range of the output is approximately 75 dB When playing back ona PC fae see it might be even lower Set Peak Recording Level to fit the signal 95 dB The values for Peak Recording Level take the sensitivity of the attached 85 dB transducer into account The values shown in the list here are nominal 75 dB values for a Type 4189 microphone Requires license for Signal Recording Option BZ 7226 A 8 Generator for L1 and L2 Table A 8 Generator for L1 and L2 Parameters Building Acoustics Software BZ 7228 User Manual Parameter Values Comment Generator Type Internal Set to nternal to use the internal noise generator as External specified below Off Traffic Noise Set to Externa to switch an external generator on off using a logic signal On 3 3 V Off 0 V The generator signal appears at the Output Socket Please note If Task Facade and Measure L1 and L2 Simultaneously then Generator Type Off Traffic N
23. say from starter pistol exceeds the user selected trigger level the decay is recorded and backwards integration performed Schroeder method The trigger can then be armed automatically for measuring at the next position Signal Recording Recording of the Z weighted measured signal can be done at each position Measurement Status On Screen Information such as overload awaiting trigger and running paused are displayed on screen as icons or text Signal recording requires an SD card or USB stick for data storage and a license for Signal Recording Option BZ 7226 Traffic Light Red yellow and green LEDs show measurement status and instantaneous overload as follows e Yellow LED flashing every 5 s stopped ready to measure e Green LED flashing slowly awaiting trigger or calibration signal e Green LED on constantly measuring e Yellow LED flashing slowly paused measurement not stored e Red LED flashing quickly intermittent overload calibration failed Calibration Initial calibration is stored for comparison with later calibrations Acoustic Using Sound Calibrator Type 4231 or custom calibrator The calibration process automatically detects the calibration level when Sound Calibrator Type 4231 is used Electrical Uses internally generated electrical signal combined with a typed in value of microphone sensitivity Calibration History Up to 20 of the last calibrations made are listed and can be viewed on
24. single values should be reported without decimals as shown in Fig 4 40 This also indicates that the reference curve has been shifted with 1 dB increments during the calculation as stated for all standards except NEN and NEN 06 To estimate the uncertainty of the results the reference curve can be shifted in increments of 0 1 dB see setting Ref Curve Increment on page 31 For Airborne and Fa ade measurements the result values will be up to 0 9 dB higher than the result values calculated with 1 dB Ref Curve Increment For Impact measurements the result values will be up to 0 9 dB lower than the result values calculated with 1 dB Ref Curve Increment If the difference is close to zero then the result is more sensitive to small changes in the measurement conditions A yellow smiley is set at the single result values when Ref Curve Increment is set to 0 1 dB to indicate that the increment is not set as stated by the standard for reporting results CHAPTER 4 Building Acoustics Software os 4 9 Quality Indicators Building acoustics software offers a wide range of status indicators and smileys They are listed in Table 4 3 Table 4 4 Overview of Status Indicators and Smileys Status gt gt m Smile Explanation Description Code y P P M 5 Manual data input RT entered by user B amp Maximum background noise High background noise correction used N 5 No decay end found The end of
25. synchronization of setups and data between the PC and hand held analyzer BZ 5503 is supplied on ENV DVD BZ 5298 PC REQUIREMENTS Operating System Windows 7 8 or 8 1 all in 32 bit or 64 bit versions Recommended PC e Intel Core i3 e Microsoft NET 4 5 e 2 GB of memory e Sound card e DVD drive e At least one available USB port e Solid State Drive ON LINE DISPLAY OF TYPE 2250 2270 DATA Measurements on Type 2250 2270 can be controlled from the PCand displayed on line with the PC using the same user interface on the PC as on Type 2250 2270 Display 1024 x 768 1280 x 800 recommended DATA MANAGEMENT Explorer Facilities for easy management of analyzers Users Jobs Projects and Project Templates copy cut paste delete rename create Data Viewer View measurement data content of projects Synchronization Project Templates and Projects for a specific user can be synchronized between PC and Type 2250 2270 and between local and cloud archives Measurement Partner Suite BZ 5503 merges Measurement Partner Field App annotations with the corresponding analyzer project USERS Users of Type 2250 2270 can be created or deleted EXPORT FACILITIES Excel Projects or user specified parts can be exported to Microsoft Excel Excel 2003 2010 supported Briel amp Kj r Software Projects can be exported to Predictor LimA Type 7810 Acoustic Determinator Type 7816 Evaluator Type 7820 Protector Type 7
26. the instrument Signal Monitoring Input signal A C or Z weighted can be monitored using an earphone headphones connected to the headphone socket Headphone Signal Input signal can be monitored using this socket with headphones earphones Gain Adjustment 60 dB to 60 dB Building Acoustics Software BZ 7228 User Manual Voice Annotations Voice annotations can be attached to the building acoustics project and to measurements at each position Playback Playback of voice annotations or signal recordings can be listened to using earphone headphones connected to the headphone socket Gain Adjustment 60 to 0 dB Text and Image Annotations Text and image Type 2270 only annotations can be attached to the building acoustics project and to measurements at each position Data Management Project Template Defines the display and measurement setups Project Measurement data for all positions defined in source room L1 and in receiving room L2 B2 and T2 are stored with the Project Template Re use of data Data for L1 B2 or T2 in one project can be re used in another project Job Projects are organized in Jobs Explorer facilities for easy management of data copy cut paste delete rename view data open project create job set default project name Software Specifications Measurement Partner Suite BZ 5503 BZ 5503 is included with Types 2250 2270 and 2250 Light referred to as Type 2250 70 here for easy
27. then press Start Pause pushbutton to perform the first measurement and view the result Finally press the Save amp pushbutton to save your level measurement at the first position Please note For more detailed information on saving setups and templates and organising your 4 4 3 measurements please refer to the following sections in the Hand held Analyzer Types 2250 and 2270 User Manual Section 3 4 Save your Measurement Section 6 1 Organising Measurements Section 4 4 8 How to Manage Templates e Section 4 4 7 How to Personalise your Setup About this Section If you are not familiar with building acoustic measurements you should read through the sections on setting up and controlling the instrument section 4 4 4 and section 4 4 5 that follow and then work through the planned procedure section 4 4 6 These sections together with the analyzer itself will guide you through the level measurement procedures However if you are already familiar with building acoustic measurements and have a rough idea of the procedure you can skip the planned procedure and go straight to the unplanned procedure see section 4 4 7 and read as much of the preceding sections as you need to Please note You can perform single or 2 channel building acoustic measurements with Type 2270 4 4 4 and single channel measurements with Type 2250 Please refer to the following section for single channel measurements
28. this list you can create edit and delete annotations in the same way as you can on the Project Annotation list A selection of default metadata is included with the software in order to provide a starting point for metadata usage and cut down setup time Measurements with annotations are indicated by inthe Overview display and by a smaller paperclip icon on the Overview tab 4 12 3 Adding Images to a Measurement You can also attach an image Type 2270 only Similar to adding notes or comments adding an image can also be done before during or after saving the measurement by a tap B gt Add Image to the current measurement in the list of options The Viewfinder display will then appear showing what is coming through the camera lens The camera has fixed focus and automatically adjusts the light sensitivity you just have to position the analyzer so that the object you want to capture is visible in the Viewfinder and press the Manual Event lt lt pushbutton or tap on the icon to capture the image When captured the image is presented as a still picture see Fig 4 44 and you can save the captured image by pressing the Save amp pushbutton or by closing the Images view or you can reject the image by pressing the Back erase pushbutton CHAPTER 4 67 Building Acoustics Software Fig 4 44 Example of an image used to document a measurement position When finished tap on the EJ icon to return to the measurement s
29. to lower the background noise which might not be possible or increase the power of the loudspeaker in the source room If your loudspeaker already produces as much noise as possible then you can limit the frequency range of the noise to cover just a single frequency band while keeping the output power constant thus increasing the noise level in the smaller frequency range For a 1 3 octave band this will increase the noise level at the band by up to 10 dB 40 Building Acoustics Software BZ 7228 User Manual Fig 4 21 BUILDING ACOUSTICS ISO Airborne Indication that the d Ser Project002 B L2 background noise level W lt 00 00 10 Uncal is too high LCF 69 8 dB LAF 66 8 dB Spectrum To select the frequency bands to be measured using noise limited to cover these bands only tap Main Menu gt Setup gt Measurement Control L1 L2 and B2 gt Level Measurement Mode and select Serial On the Spectrum tab select the bands you want to measure using the cursor and tap on the x axis to select the band for serial measurement see Fig 4 22 Fig 4 22 Selecting the bands for serial measurement Please note A small s appears above the selected frequency bands see Fig 4 22 When you have selected the frequency bands you want to re measure press the Start Pause pushbutton The analyzer will then start at the lowest selected frequency band generate noise at this band make the measurement and auto
30. to save the measurement automatically Level Measurement Mode set to Parallel for measuring all bands in a spectrum simultaneously set to Seria for measuring selected bands only to be saved and merged with a previously measured Parallel spectrum or set to Combined for measuring Parallel and then Serial in an automated sequence When doing the Serial measurement the bandwidth of the generator will match the selected band thus increasing the output power for the band and increasing the signal to noise ratio for the band Generator Setup for L1 and L2 7 Generator Type Set to Externa if you want to control an external generator see Table A 8 Set to Jnterna to use the internal generator see Fig 4 13 Fig 4 13 ae a O Generator setup forL1 Measurement Control L1 L2 and 82 A and L2 Generator L1 and L2 Generator Type Internal Noise Type Pink Level re 1 V 0 0 dB Escape Time 3s Build up Time is Sound Source Unknown Measurement Control T2 Generator T2 Signal Recording Geometry Calculations automatically selected Some standards require a planned measurement and for those standards Planned Measurement is Building Acoustics Software BZ 7228 User Manual 8 Noise Type choose the type of noise for the internal generator Pink noise is typically used 9 Level re 1 V Adjust the level of the internal generator output to match the input of the power amplifier used Hint You c
31. waste handling instructions e Do not dispose of electronic equipment or batteries as unsorted municipal waste e It is your responsibility to contribute to a clean and healthy environment by using the appropriate local return and collection systems e Hazardous substances in electronic equipment or batteries may have detrimental effects on the environment and human health e The symbol shown to the left indicates that separate collection systems must be used for any discarded equipment or batteries marked with that symbol e Waste electrical and electronic equipment or batteries may be returned to your local Briel amp Kj r representative or to Bruel amp Kj r Headquarters for disposal Briel amp Kjaer has made every effort to ensure the accuracy of the information contained in this document No responsibility is accepted for any errors or omissions herein It is the responsibility of the user to ensure compliance with any legal or statutory requirements in the country of use Data may change as well as legislation therefore you are advised to obtain copies of the most recently issued applicable regulations standards and guidelines All descriptions illustrations and any other information relating to the product are made by way of general description are approximate only and for the general guidance and information of the user They cannot be construed to imply representation or warranty as to their accuracy currency or comple
32. 0 V Generator off 3 3 V Generator on Rise time and Fall time 10 us Control See Measurement Control Measurements Measurements are done at a number of positions and categorized in functions L1 for Source Room levels L2 for Receiving Room levels B2 for Receiving Room Background noise levels and T2 for Receiving Room Reverberation Time measurements LEVELS L1 L2 AND B2 Lzp spectrum for display only Lzeq in 1 1 octave or 1 3 octave bands L1 and L2 simultaneously or as single channels Averaging time 1 s to 1 hr Range L1 and L2 simultaneously only Autorange or manually set to High Range or Low Range Averaging Up to 10 source positions each with up to 10 measurement positions or up to 100 measurements may be averaged Status Indications Overload under range etc Crosstalk 5 Hz 10 kHz lt 110 dB 10 kHz 20 kHz lt 100 dB REVERBERATION TIME T2 T20 and T30 in 1 1 octave or 1 octave bands Decays L7 spectra sampled at 5 ms intervals Evaluation Range 5 to 25 dB for T20 and 5 to 35 dB for T30 Measurement Time Automatic selection of measurement time for the decays based on the actual reverberation time of the room Maximum Measurement Time From 2 to 20 s Averaging T20 and T30 measurements can be averaged arithmetic averaging or ensemble averaging T20 and T30 Calculation From slope in evaluation range Slope Estimation Least squares approximation Quality Indicators Quality indicat
33. 0 x 93 x 50 mm 11 8 x 3 7 x 1 9 incl preamplifier and microphone User Interface USERS Multi user concept with login Users can have their own settings with jobs and projects totally independent of other users PREFERENCES Date Time and Number formats can be specified per user CHAPTER 5 Specifications LANGUAGE User Interface in Catalan Chinese People s Republic of China Chinese Taiwan Croatian Czech Danish English Flemish French German Hungarian Japanese Italian Korean Polish Portuguese Romanian Russian Serbian Slovenian Spanish Swedish Turkish and Ukranian HELP Concise context sensitive help in Chinese People s Republic of China English French German Italian Japanese Polish Romanian Serbian Slovenian Spanish and Ukranian UPDATE OF SOFTWARE Update to any version from 4 0 and up using BZ 5503 included through USB or update via Internet REMOTE ACCESS Connect to the analyzer using Measurement Partner Suite BZ 5503 using Measurement Partner Field App iOS or Android smartphone app using the 2250 2270 SDK Software Development kit using a REST interface through HTTP or using an Internet browser supporting JavaScript The connection is password protected Two levels of protection e Guest level for viewing only e Administrator level for viewing and full control of the analyzer CLOUD Connect to Measurement Partner Cloud on cloud bksv com for transferring data t
34. 1 L2 and B2 Generator L1 and L2 Measurement Control T2 Generator T2 Signal Recording Geometry Calculations 4 Set the Task parameter to Airborne Impact or Facade whichever is appropriate Airborne has been selected in Fig 4 10 The task can also be changed by tapping on the task name in the black bar at the top of the measurement screen and selecting the required task from the drop down list that appears 28 Building Acoustics Software BZ 7228 User Manual Setting the Bandwidth and Frequency Range 5 Set the Bandwidth and Bottom and Top Frequency of the measurement as required see the example in Fig 4 11 These parameters are set automatically by the selected standard however you can select a wider frequency range than required by the standard Please note While some standards also allow 1 1 octave or 1 3 octave measurements ISO 16283 locks the Bandwidth parameter to 1 3 octave Fig 4 11 Setting the Bandwidth Input and Bottom and Top Standard eed frequencies Frequency Range Bandwidth 1 3 octave Bottom Frequency 100 Hz Top Frequency 3 15 kHz Measurement Control L1 L2 and B2 Generator L1 and L2 Measurement Control T2 Generator T2 Signal Recording Geometry Calculations aA Measurement Control Setup L1 L2 and B2 6 Set the measurement control parameters as required see Fig 4 12 Fig 4 12 ar a Measurement control Frequency Range r setup Measu
35. 8 37 Spatial Averaging Specifications seitaire aaier Type 2250 2270 Platform eee eeeeeees 70 Spectrum Graph eeeeeeeccesesseeeeetseeeaeeeeeeeetseeeetees 45 Spectrum Graphs in Reverberation Time Software eceeeeeeeee 45 Spectrum Parameters Measurement Display 36 Spectrum Parameters Result Display 49 57 Spectrum TaD reiii Spectrum Tab Type 2270 Spectrum Table cccceccececceceeeeeeeeeeeeeseeeeeeeeeeees 63 Spectrum View L1 L2 L1 amp L2 and B2 cceee 22 Spectrum View T2 oc eececceseeceeeeceeeeeeeeeseeeeeeeeeeaee 23 SpectrumTab in Reverberation Time Software 45 Standard sissie iea anaa aaia ia 84 Standard Selector ccceccecceeeeeeeeeeceeeeeeeeeeseeeeeees 18 T2 Measurement Mode T2 M aSureMents asii iiia T2 Selector T20 Pos TIOiara tesy T30 POSA Ei Tab Calculations mi Aaa aes POCA 5 singe a aa E A E SEMEIA Decay T2 isi ccnicaveiecstevececeerevecnendsoscieeetennevers 017V cAn AEE Spectrums mrna n aara i a Spectrum T2 Tab Overview Type 2270 sssssseeeeeceerere 55 Tab SpeCtrum rniii iiai 44 Tab Spectrum Type 2270 sesser 55 Task Selectol rer ne aeiia aae 19 Tasks in Building Acoustics ceeceeeeeteeeeteteeeeeeee 3 Things to Remember ssssssssreessssrssnsrnrsnarrnesnnsrnnraane 24 Trafi NOS assi2e cece ccesceaeaeseeseecreeeee cereesechaneudeeeee anes 11 Trial Measurement ccceeeeeeeeeeee
36. 825 or Qualifier Light Type 7830 7831 POST PROCESSING Measurement Partner Suite is a suite of modules including post processing tools for data acquired with Type 2250 2270 The following post processing modules are available e Logging Module BZ 5503 A e Spectrum Module BZ 5503 B e WAV File Analysis Module BZ 5503 C These modules help to assess logging data and measured spectra such as calculating contribution from markers on a logging profile or correcting spectra for background noise Not all data are available in all exports The data exported are dependent on the type and target of the export CHAPTER 5 Specifications TYPE 2250 2270 SOFTWARE UPGRADES AND LICENSES The software controls Type 2250 2270 software upgrades and licensing of the Type 2250 2270 applications INTERFACE TO TYPE 2250 2270 USB LAN or Internet connection USB Connection e Hardware versions 1 3 USB ver 1 1 e Hardware version 4 USB ver 2 0 LICENSE MOVER To move a license from one analyzer to another use BZ 5503 together with License Mover VP 0647 LANGUAGE User Interface in Chinese People s Republic of China Chinese Taiwan Croatian Czech Danish English Flemish French German Hungarian Japanese Italian Korean Polish Portuguese Romanian Russian Serbian Slovenian Spanish Swedish Turkish and Ukrainian HELP Concise context sensitive help in English Specifications Signal Recording Option BZ 7226 Si
37. 83 measurement as described in section 4 4 and set Main Menu gt Setup gt Calculations gt LF Project to the name of the ISO 16283LF project Please note e The generator settings for L1 and L2 must be identical for the ISO 16283 and ISO 16283LF projects e The ISO 16283LF project must contain valid data 4 6 2 Example of a Low frequency Measurement Task The task is to determine the airborne sound insulation between two rooms according to ISO 16283LF 1 Connect the cables amplifier and sound source please refer to Fig 3 1 2 Under the Standard parameter set Standard to SO 16283LF and Task to Airborne both indicated next to the template selector see example in Fig 4 30 Please note Only those parameters noted below need to be set up for a Planned Measurement task the remaining parameters should be left at their default settings CHAPTER 4 51 Building Acoustics Software Fig 4 30 Typical ISO 16283LF Airborne spectrum display dB 80 Hz 56 55 dB DM 15 09 31 3 The sound level of the source room will be determined indicated below the Template Selector by the Function Selector 2 4 With an empty Building Acoustics template under the Measurement Control L1 L2 and B2 parameters Planned Measurement locked to On Set Number of Sources Positions to 2 The number of measured B2 and L2 positions are the same because background noise corrections require LL S1 PosW L1 S2 PosWVand B2 Pos N must
38. Excitation Method 1 Set the Trigger Level tap Main Menu Eq gt Setup gt Measurement Control T2 gt Trigger Level and enter the level 2 Press the Start Pause pushbutton and the analyzer waits for the level to exceed the trigger level the traffic light will flash green every second 3 The impulse excitation for example a starting pistol is fired or a balloon is burst is made Caution The use of hearing protection is highly recommended 4 The impulse measurement is started 1 s before the level exceeds the trigger level 5 The impulse measurement stops after the analyzer detects the background noise level again automatically measured by the analyzer 6 The analyzer performs backward integration of the impulse measurement according to the Schroeder method 7 The reverberation time spectra T20 and T30 are calculated and displayed on the screen CHAPTER 2 11 Building Acoustics Measurements The measurement is in octaves or 1 3 octaves in parallel over a selectable frequency range In each frequency band the decay is sampled 200 times each second In theory the resulting decay will be equivalent to the average of a large number of decays using the interrupted noise method Therefore the decay will be smooth using a single shot 2 2 3 Fa ade Sound Insulation Fa ade sound insulation is airborne sound insulation with the source room being the space outside a building and the receiving room being inside th
39. F Project Text entry Enter the ISO 16283LF project name Ref Curve Increment 0 1 dB 1 dB Set Ref Curve Increment to 1 dB to shift the reference curve in steps of 1 dB when calculating the result parameters This is the recommended way of operation for reporting correct result parameters as required by the standard Set Ref Curve Increment to 0 1 dB to shift the reference curve in steps of 0 1 dB when calculating the result parameters This is the recommended way of estimating the uncertainty of the results Results are displayed with 0 1 dB resolution Please note The parameter has no effect for NEN and NEN 06 standards Ensemble Averaging No Yes Set to Yes to average each of the position decays into an average decay called the ensemble average or Room average The averaged decays of the room can then be displayed inthe Decay View T20 and T30 will be calculated from the Room average Set to Vo for no ensemble averaging There will be no decays available for the room T20 and T30 will be calculated as averages of the T20 Pos and the T30 Pos resp for all the positions Receiving Room Volume 0 1 to 100000 m Used in calculation of results Partition Area S 0 1to 1000 m Used in calculation of results TO 0 01 to 10s The reference reverberation time typically 0 5 s but it may vary with standards Table A 11 Cont Calculation Parameters APPENDIX A Setup
40. L 1017 SDHC Memory Card for Hand held Analyzers ZG 0444 Charger for Battery Pack QB 0061 Br el amp Kj r supplies a wide range of microphones and microphone accessories Please contact your local Br el amp Kj r office for more information regarding the different types and their use or visit the website at www bksv com INTERFACING BZ 5503 D Measurement Partner Field App for iOS and Android free download at App Store and Play BZ 5503 E Measurement Partner Cloud entry level free cloud storage Measurement Partner Cloud basic basic cloud storage subscription for one year Measurement Partner Cloud professional enterprise cloud storage subscription for one year BZ 5503 F 012 BZ 5503 G 012 Building Acoustics Software BZ 7228 User Manual AO 1449 D 010 LAN Cable UL 0250 USB to RS 232 Converter UL 1050 Micro USB Wi Fi dongle SOUND SOURCES Type 4292 L OmniPower Sound Source Type 4295 OmniSource Sound Source Type 3207 Tapping Machine Type 2734 A Power Amplifier Type 2734 B Power Amplifier with Wireless Audio System UL 0256 For further information please refer to the Sound Sources for Building Acoustics product data BP 1689 Type 4224 Portable Battery amp Mains Powered Sound Source For further information please refer to the Sound Source Type 4224 product data BP 0066 Service Products accredited Calibration 2250 J CEl Initial Calibration 2250 J CEF Periodic Calibration 2270 K CEI Initia
41. Microphone Nominal Open circuit Sensitivity 50 mV Pa corresponding to 26 dB re 1 V Pa 1 5 dB Capacitance 14 pF at 250 Hz MICROPHONE PREAMPLIFIER ZC 0032 Nominal Preamplifier Attenuation 0 25 dB Connector 10 pin LEMO Extension Cables Up to 100 m in length between the microphone preamplifier and Type 2250 2270 without degradation of the specifications MICROPHONE POLARIZATION VOLTAGE Selectable between 0 V and 200 V SELF GENERATED NOISE LEVEL Typical values at 23 C for nominal microphone open circuit sensitivity Weighting Microphone Electrical Total A 14 6 dB 12 4 dB 16 6 dB B 13 4 dB 11 5 dB 15 6 dB Cc 13 5 dB 12 9 dB 16 2 dB Z 5 Hz 20 kHz 15 3 dB 18 3 dB 20 1 dB Z 3 Hz 20 kHz 15 3 dB 25 5 dB 25 9 dB Interface KEYBOARD Pushbuttons 11 keys with backlight optimized for measurement control and screen navigation ON OFF BUTTON Function Press 1 s to turn on press 1 s to enter standby press for more than 5 s to switch off STATUS INDICATORS LEDs Red amber and green DISPLAY Type Transflective back lit colour touch screen 240 x 320 dot matrix Colour Schemes Five different optimized for different usage scenarios day night etc Backlight Adjustable level and on time USER INTERFACE Measurement Control Using pushbuttons on keyboard Setup and Display of Results Using stylus on touch screen or pushbuttons on keyboard
42. NIC Calculated DnAT DnTA Ilu DnT A NNIC Parameters RA Ilu k DnT A k R A RA FSTC R A ISO ISO A i OILR Facade plus plus c Gi OITL R 45 A R 45 Aav R 45 Aef R 45 Atr R A R Atr 2 o D2m A RAIS D2m Aav Dls 2m nAT D2m Aef Dtr 2m nAT Calculated Dtr 2m A D2m Atr Ga Ga oltc Parameters GN D2m n A Ga Ga Dis 2m A i Dls 2m n w C D2m n Aav Dis 2m n w Ctr D2m n Aef OTRA D2m n Atr D2m nT A D2m nT Aav D2m nT Aef D2m nT Atr Dls 2m n w C Dis 2m n w Ctr Impact Lo See ISO LnT LnT Ln plus Calculated LnAT Parameters LnA Ico Feist Index Numerics 2 channel Measurement cccceeeeeeeeeeeseeeeeteeeees 14 GiB Rules acu Nanni A E a A aaa 14 A Adding Image to Current Measurement 4 66 Adding Images to a Measurement Airborne Sound Insulation cccceeeeeeeeeeeeees Airborne Sound Insulation Measurements Setipinna hans adie anaes anaes 4 Airborne Task 19 Annotations 65 Paperclip ICON eee 20 Annotations and Sound Recording sseeeeeeees 65 Annotations ICON cccccceeeeeeeeeeeeeeeeeeeeeeeeeseneeeeeeee 20 Annotations on Measurement 66 Automated Sequence Combine Parallel and Serial Measurements 41 Automatic INCrement ccceceeeeeeeeeeeeeeeeeeeeeneeeeenee 37 Automatic Save ecccccccecccceceececeeeeeeeeeeeeeeeeeseaeeeeeees 37 AULOLANGS wivctscesserscecderecectecivicescesestenvtiveeteescerssvanr
43. O S2 Pos2 O 1 Pos3 s O S2 Pos3 s Spectrum ecay ad 14 06 10 The header row contains from left to right The T2 selector T20 or T30 which determines which T2 to display in the table rows below It is also linked to the main Spectrum selector and main Decay selector The Frequency selector which includes decrement K and increment Bg buttons determines the frequency of the readouts in the table rows below The frequency selector is linked to the Spectrum cursor and the frequency of the selected decay Readout of the T2 value for the current measurement before it is saved to a position CHAPTER 4 a5 Building Acoustics Software Each row of the table contains from left to right A checkmark controlling whether the position is included or excluded from the average Tap on the checkbox to include check or exclude uncheck the position All positions are by default included in the average e Tap on the position to get a drop down menu with two options Se ect and View Annotations Use Se ectto select a position other than the one automatically selected if you need to go back and redo a measurement for example Use View Annotations to view the list of annotations for the position You can add annotations on the position from this view e Possible annotations are indicated by iJ Tap on it to view the list of annotations for the position e Thereadout ofthe T2 parameter at the frequency determined by t
44. Parameters Parameter Values Comment Calculate Using T30 T20 Use this parameter to specify which of the measured reverberation time values to use in the calculations If T30 is specified and available then T30 is used otherwise T20 is used Correct for Background Noise Yes No Use this parameter to specify whether L2 should be corrected for the background noise B2 or not L1 Check 6 dB Rule Yes No Select Yesif you want to check whether the sound spectrum in the source room has differences in level greater than 6 dB between adjacent 1 3 octave bands or not The check is done according to the method specified in ISO 140 4 1998 6 2 If a difference greater than 6 dB is found then the bands are marked with a yellow smiley When the smiley is tapped the following explanation appears L1 gt 6 dB difference to adjacent band L1 L2 Check Std Deviation Yes No Select Yes if you want to check whether the standard deviation of the averaged sound spectra in the source and receiving rooms is too big or not The check is done according to the method specified inISO 140 14 2004 A 5 If the standard deviation in a frequency band is greater than twice the theoretical expected value then the band is marked with a yellow smiley When the smiley is tapped the following explanation appears L1 or L2 High Standard Deviation Receiving Room Floor Area 0 1 to 10000 m Used to determin
45. Partner Suite BZ 5503 via USB or a network connection LAN 2 connected to a network through an Ethernet cable Wi Fi 3 connected to a network via Wi Fi 9 indicates a lost connection Commentary spoken commentary is being recorded together with an indication of the available recording time Recording 69 measurement signal is being recorded Paperclip an annotation is attached to the project Tap the icon to go to the Annotations screen The Function Selector CHAPTER 4 3i Building Acoustics Software Line 2 e Measurement Status e Generator On Off Loudspeaker 4 icon e Elapsed Time of measurement e Feedback on measurement keys e Uncal status on calibration e Overload Underrange indication e Transducer icons one per channel linked to Setup Line 3 e Position Selector drop down menu e Icons for stepping backwards or forwards in positions E or BM Smiley for the position e Link to results RESUMES see section 4 8 4 2 5 Overview L1 L2 L1 amp L2 B2 and T2 The Overview tab shows the measurement positions in a table one position per row see Fig 4 4 Fig 4 4 BUILDING ACOUS ISO 16283 Overview options Spectrum 21 18 51 Tap on a position in the table i e Pos1 for the following options e Select selects the active position which is highlighted by black bar e View Annotations displays the list of annotations for the measurement e Cut cuts the measu
46. USER MANUAL Building Acoustics Software BZ 7228 for use with Hand held Analyzer Types 2250 and 2270 English ni a ES Bruel amp Kj r Building Acoustics Software BZ 7228 for use with Hand held Analyzer Types 2250 and 2270 Valid for all hardware versions and from software version 4 5 User Manual BE 1799 17 July 2015 www bksv com Health and Safety Considerations This apparatus has been designed and tested in accordance with IEC EN61010 1 and ANSI UL61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use This manual contains information and warnings which must be followed to ensure safe operation and to retain the apparatus in safe condition Safety Symbols and Signal Words Used A The apparatus will be marked with this symbol when it is important that you refer to the associated danger or warning statement given in this manual The manual uses this symbol when a danger or warning statement is applicable Hazardous Voltage Electricity Both the apparatus and manual use this symbol when there is a risk for shock or electrocution Hot Surface This manual will use this symbol when there is a risk for burning or scolding Earth Ground Terminal The apparatus will be marked with this symbol when applicable Protective Conductor Terminal The apparatus will be marked with this symbol when applicable Ore ee gt ternating Current The apparatus will be marked
47. USTICS ISO Airborne 110 _ _ _ 250 ik 4k 10k AC Ch 2 LAF 78 1 dB Preset Time 00 00 10 Spectrum Please note lower graph 10 You can check sound source level by switching it on and off using P Please note Ready for First Measurement LAF and LAC broadband readouts are always shown to the right in the spectrum Ch 1 LZF can only be selected in the upper graph and Ch 2 LZF can only be selected in the 56 Building Acoustics Software BZ 7228 User Manual 11 The third line of the status field shows 51 Pos1 This is the position selector and it indicates the current source and microphone position The current source and microphone position are also displayed in a list on the Overview tab see Fig 4 18 12 On the Spectrum tab select L1 Pos as the upper graph and 2 Pos as the lower graph see example in Fig 4 37 Please note If you would like be able to monitor the average level of L1 and L2 throughout the measurement you can select L7 as the upper graph and 2 as the lower graph 13 Press Start Pause pushbutton to perform the first measurement this is indicated by S1 Pos1 being displayed in the status field The indicates that the measurement has not been saved see Fig 4 37 Fig 4 37 Measurement not yet saved after a simultaneous 2 channel measurement ll 250 ik 4k 10k AC Ch 2 LAF 78 1 dB Preset Time 00 00 10 Spectrum
48. al Measurement To familiarize yourself with the measurement procedure and to see how easy it is to measure building acoustics you might like to try an unplanned trial measurement using the default setup and settings in the BUILDING ACOUSTICS Project Template This template contains the setup and parameters that Bruel amp Kj r considers necessary to perform a basic unplanned building Building Acoustics Software BZ 7228 User Manual acoustics measurement starting with the L1 measurements For example the ISO 140 standard and Airborne task are selected the microphone is selected L1 is selected etc All you have to decide is where to position your sound source and your microphone s in the source room You should not have to change the default settings for your first trial measurements but later when you have gained more measurement experience you can change them according to your requirements Please note The default setup and settings are only available immediately after the programme has been installed on your analyzer these settings are overwritten every time a user saves the BUILDING ACOUSTICS Project Template So please be aware that the may have been edited by a previous user and check the settings if you are not sure Simply select the BUILDING ACOUSTICS Project Template if not already displayed tap on the black bar at the top of the screen and select BUILDING ACOUSTICS from the drop down menu that appears
49. alysis Software BZ 7224 Logging Software BZ 7225 Enhanced Logging Software BZ 7225 UPG Upgrade from Logging Software BZ 7224 to Enhanced Logging Software BZ 7225 does not include memory card BZ 7226 Signal Recording Option BZ 7227 Reverberation Time Software BZ 7230 FFT Analysis Software BZ 7231 Tone Assessment Option BZ 7234 Low Frequency Option PC SOFTWARE BZ 5503 A Measurement Partner Suite Logging Module BZ 5503 B Measurement Partner Suite Spectrum Module BZ 5503 C Measurement Partner Suite WAV file analysis module Type 7830 Qualifier MEASUREMENT ACCESSORIES Type 3923 Rotating Microphone Boom Type 4231 Sound Level Calibrator AO 0440 D 015 Signal Cable LEMO to BNC 1 5 m 5 ft AO 0646 Sound Cable LEMO to Minijack 1 5 m 5 ft AO 0697 030 Microphone Extension Cable 10 pin LEMO 3 m 10 ft AO 0697 100 Microphone Extension Cable 10 pin LEMO 10 m 33 ft AR 0199 Flat Cable 10 pin LEMO 0 5 m 1 64 ft JP 1041 Dual 10 pole Adaptor KE 0449 Flight case for OmniPower Sound Source Type 4292 L UA 0587 Tripod UA 0801 Lightweight Tripod UA 1317 2 Microphone Holder UA 1404 Outdoor Microphone Kit UA 1476 Wireless Remote Control Unit r UL 0256 Wireless Audio System kit B amp K specified UL 0256 A Wireless Audio System AKG WMS 470 Set RF Band VII 50 mW UL 1009 SD Memory Card for Hand held Analyzers UL 1013 CF Memory Card for Hand held Analyzers for hardware versions 1 3 U
50. an manually turn the generator on and off by tapping on the loudspeaker icon in the status field 10 Escape Time set this to allow you to leave the room before the generator is turned on during the measurement 11 Build up Time set this to allow the excitation noise to reach a steady state before the measurement starts One second is adequate in ordinary rooms but should be increased for larger halls 12 Sound Source select a type matching your sound source Select Unknown if you are using a non Briiel amp Kj r sound source or do not want to make a correction to the frequency response For Briiel amp Kj r sound sources you may linearize the power frequency response in two steps by setting Sound Source Optimum or Fiat which is at the expense of a decrease by two steps of the total power Setup for Signal Recording 13 Signal Recording set Recording Control to Automatic if you want to record the microphone signal during the measurement The recordings can be played back afterwards so you can investigate why the measurements differed from each other and what the cause was for example background noise 14 Recording Quality this parameter determines the quality of the recording by adjusting the sampling rate The amount of space required for the recording on the memory card will depend on the selected quality see Table A 7 on page 87 15 Resolution set this parameter to fit the signal see Table A 7
51. and templates from the analyzer to your PC and vice versa Control measurements on the analyzer from the PC and display them on line using the same user interface on the PC as on the analyzer View Building Acoustics results in the Archives Edit the project templates Organise data on the analyzer Export your building acoustics projects from archives to Qualifier Type 7830 for further post processing and for reporting Create users on the analyzer Upgrade software on the analyzer Install software licenses on the analyzer Data transferred to the PC are organised in Archives For further information please refer to the on line help included with the relevant PC Software This software is supplied on the Environmental Software CD ROM BZ 5298 which is included with the analyzer 9 Chapter 5 Specifications This chapter comprises the specifications that are needed for evaluation of instrument performance characteristics and proper use of the instrument Some of the applicable sound level meter standards require additional technical documentation in particular for pattern evaluation type approval purposes but have no bearing on normal use The additional technical documentation is given in a separate Briel amp Kj r instruction manual BE 1712 Specifications Hand held Analyzer Type 2250 2270 Platform Microphone SUPPLIED MICROPHONE Type 4189 Prepolarized Free field Microphone or Type 4190 Free field 4
52. art Pause pushbutton to make a Pos measurement An empty Pos1 has been created and selected in the Overview table e Press the Save amp pushbutton to save the measurement at Posi e Press the Start Pause pushbutton to make a Pos measurement and repeat the above procedure for the remaining positions in your measurement sequence 4 5 2 Building Acoustics Software BZ 7228 User Manual Displaying the Results The Reverberation Time measurement screen includes three tabs at the bottom Overview Spectrum and Decay You can view the measurement results in three different ways using the tabs at the bottom of the screen 4 5 3 Overview Shows the measurement positions in a table one position per row Use this to get an overview of your measurements to include exclude positions from the spatial average of all positions in the room and to manage annotations signal recordings at the positions Spectrum Shows the reverberation spectra graphically or as a table for one position or for the room average Alternatively it can show the instantaneous sound pressure level while measuring Decay Shows the reverberation decay at a single frequency for one position or for the room average set Main Menu Eq gt Setup gt Calculations gt Ensemble Average to Yes Overview The Overview tab shows the measurement positions in a table one position per row Fig 4 24 Overview tab S1 Pos1 S2 Pos1 Os
53. as a couple of advantages over single channel measurements these are as follows e Measurements of Facade sound insulation with traffic noise as a sound source require that the source measurement outdoors and receiving room measurements are taken at the same time this requires 2 channel capability e Using two channels allows you to measure L1 and L2 simultaneously which speeds up the measurement process e Using two channels allows you to measure two positions simultaneously which speeds up the measurement process Measure L1 and L2 Simultaneously 7 Set the Measure L1 and L2 parameter to Simultaneously under Input selections When you then select the 1 amp 22 function see Fig 4 35 the analyzer will measure L1 using Ch 1 and L2 using Ch 2 Fig 4 35 BUILDING ACOUSTICS ISO Airborne Measuring L1 and L2 simultaneously Planned measurement 100 Hz Os1 Pos2 Os1 Pos3 Os2 Pos1 dB Os2 Pos2 dB OsS2 Pos3 Spectrum 14 31 34 Overview CHAPTER 4 Building Acoustics Software 5 8 The Overview tab still shows either the L1 or the L2 measurements you select which one to display by the leftmost parameter on the black frequency selection line 9 Selectthe Spectrum tab to check the levels by selecting the instantaneous levels Ch 1 LZF and Ch 2 LZF see Fig 4 36 Fig 4 36 Checking the instantaneous levels during an L1 and L2 measurement Z 100 Hz at 100 Hz BUILDING ACO
54. ator L1 and L2 gt Build up Time and enter the time to allow for the sound field to reach a steady state 3 If you are using Type 2250 or Type 2270 for a single channel measurement the analyzer starts to measure from this point However if you are using Type 2270 with BZ 7229 it is possible to measure L1 and L2 simultaneously by connecting two microphones to your Type 2270 If this is the case the analyzer goes into Autorange if this setup option is chosen where the detected level is used to choose the most convenient range either High Range or Low Range Please note See Hand held Analyzer Types 2250 and 2270 User Manual Chapter 2 for details about mounting the microphones 4 The measured spectra are averaged by the analyzer in the chosen averaging time Avg Time 8 Fig 2 2 Building Acoustics Software BZ 7228 User Manual 5 The noise generator is switched off Different stages of a typical L1 and L2 measurement cycle dB L1 and L2 Level measurement I Escape Build up Auto Avg Time l l l g l i Time Time range Preset Time La gt sehet I Generator On ke gt 1 Only applicable to dual channel measurements with Type 2270 960629 1 Receiving Room B2 Measurements Background level measurements B2 are made in the receiving room and can be used for correcting L2 levels automatically if this setup option is chosen Ideally B2 should be measured consecuti
55. avigating Building Acoustics Software Measurement is controlled in the same way you would control a normal Sound Level Meter measurement using Start Pause Continue Back erase and Reset pushbuttons see Hand held Analyzer Types 2250 and 2270 User Manual Chapter 3 for more details This section describes all the standard drop down menus the status panel and general navigation features of BZ 7228 software 4 2 1 Building Acoustics Software BZ 7228 User Manual Standard Selector A Standard selector is provided in the Project Template bar see Fig 4 1 Fig 4 1 Standard selector The Standard selector is used to select the supported standard on which the measurements and calculations are based see Setting the Relevant Standard and Task on page 27 and Building Standard selector Task selector BUILDING ACOUS ISO1 Airborne aT 1 25 kHz A ah 1 25 kHz 83 5 dB 100 20 100 250 500 ik 2k 3 15k AC Acoustics Standards on page 95 The options are When a project contains data the available Standard options are reduced to those compatible ISO 16283 ISO 16283LF SS DIN ONORM BS Sia 2006 UNI with the data NF e NBE e CTE e BREW NEN NEN 06 ASTM 150 140 CHAPTER 4 19 Building Acoustics Software 4 2 2 Task Selector Next to the Standard selector in the Project Template bar there is a Task selector an example of an Ai
56. be measured in the same corner for each position N Set L1 No of Mic Pos per Source and L2 No of Mic Pos per Source to 4 5 Check the levels by tapping on the lower parameter of the two parameter selectors shown above the graph and select the instantaneous level LZF see Fig 4 16 You can check the level of the sound source by switching it on and off using the loudspeaker icon KP Hint LAF and LAC broadband readouts are shown to the right in the spectrum Ready for First Measurement 6 The third line of the status field shows 1 Pos1 this is the position selector and it indicates the current source and microphone position The current source and microphone position are also displayed in a list on the Overview tab see Fig 4 17 7 Select L1 Pos instead of LZFin the lower parameter and 51 L1 in the upper parameter This will allow you to monitor the average level of L1 and the level of the current position throughout the measurement see Fig 4 17 8 Press the Start Pause pushbutton to perform the first measurement 1 Pos1 will be displayed in the status field The indicates that the measurement has not been saved After 15 seconds the measurement data are shown in the black line below the position selector Fig 4 31 left 52 Building Acoustics Software BZ 7228 User Manual Please note Fig 4 31 Overview and Spectrum tabs after the first measurement Ifasmiley appears during the measureme
57. borne or Fa ade tasks the following functions are available for copying e LI e B2 e T2 If you are using the Impact task only the following functions are available B2 T2 Ifthe project already contains data for the function that you want to replace with reused data then the reused function will overwrite the current data If the project already contains data for other functions then the reused data you want to replace it with must match the data already there e g the frequency range must be the same otherwise you will get an error message 4 12 Annotations and Signal Recording 4 12 1 Project Annotations The project can be annotated like other types of projects by clicking on it in Explorer and using the Add Note to current Measurement option from the drop down menu that appears or by pressing the Commentary 4 pushbutton A Paperclip icon is displayed in the top line with access to the list of project annotations see the example in Fig 4 43 66 Building Acoustics Software BZ 7228 User Manual Fig 4 43 Example of an overview display showing annotations and or signal recordings BUILDING ACOUSTICS ANNOTATIONS Pos2 Overview Spectrum 14 31 34 4 12 2 Annotations on Measurement In addition to the project annotation you can annotate each measurement in the Overview Tap the measurement in the Overview and select View Annotations for a list of annotations for the measurement in question Using
58. cacetsdedeeeaseecnedecaesaddesnesesdeSeveeste 84 A 5 Measurement Control L1 L2 and B2 cccccccsesssssssessssssssseseseeeseeeeeseeeseeeseeeeceeeeeeeeeeeeeeeeeens 85 A 6 Measurement Control 12 cccccccccccssssssecccesessseseeececesseeeseeeceeseseeaeseeecssseseeeseesceesesaseeseseseseeaees 86 r E eA RETo a E S E E E E EAEN A EEE teen 87 A8 Generator for Llana L2 erei a iE ATEAN EKE AEE E kR AEE A a aa 88 AED Generator TOR 2 eee e aa a E E a EEE E 89 A10 GEOMECY naeia iiaia ii aa e a aaa i a aa aiana aiaia a 91 7 a e E S o TE o EEA E E E E E E EE EAEE A 92 APPENDIX B Measurement Parameters cscssccssccssscnssccsscesccnsccnsccesccescessscnscosscnssssssesscesscsssonssosssnessessooses 95 B 1 B ilding Acoustics Standards c ccccccccssssecccccecssssseecceceeseaesesececeeseseseescesseseeeeeesceeesaeaeeeeseeeees 95 E Chapter 1 Introduction Building Acoustics Software BZ 7228 is an application package for Hand held Analyzer Types 2250 and 2270 BZ 7228 is a single channel application that can be used on Type 2250 or Type 2270 With 2 channel Option BZ 7229 Type 2270 only becomes a dual channel building acoustics tool If you are newcomer to the world of Type 2250 or 2270 you are strongly advised to study Hand held Analyzer Types 2250 and 2270 User Manual BE 1713 before reading this manual because it will enable a better understanding of the platform concept and how the BZ 7228 application package fits
59. cal example showing how you can combine tasks and measurements Source Room Project 1 Airborne Task L1 Project 2 Impact Task Receiving Room Source Room Project 1 Airborne Task L2 B2 T2 Project 3 Airborne Task L1 Project 2 Impact Task L2 reuse B2 and T2 from Project 1 Project 4 Impact Task Project 3 Airborne Task L2 reuse B2 and T2 from Project 1 eee 070126 Project 4 Impact Task L2 reuse B2 and T2 from Project 1 When using the internal noise generator L1 L2 and T2 you can enhance the signal to noise ratio by limiting the frequency range of the noise to cover just a single frequency band while keeping the output power constant Serial Measurements You first make a parallel measurement then if the signal to noise ration is too low in a few bands typically at low frequencies you select these bands for serial measurements You can then redo the measurements including only these bands and merge the results with the parallel measurement This method can also be used to redo L1 and L2 measurements at frequencies where the L1 band levels at adjacent bands differ by more than 6 dB for ISO 140 or 8 dB for ISO 16283 2 channel Measurements Type 2270 can measure two positions simultaneously thus reducing the measurement time You place two microphones at the positions you want to measure and both positions are measured simultaneously Cabling is easy because Type 2270 and the two microphones are placed
60. capacity per year Battery Indicator Remaining battery capacity and expected working time may be read out in and in time Battery Fuel Gauge The battery is equipped with a built in fuel gauge which continuously measures and stores the actual battery capacity in the battery unit Charge Time In analyzer typically 10 hours from empty at ambient temperatures below 30 C To protect the battery charging will be terminated completely at ambient temperatures above 40 C At 30 to 40 C charging time will be prolonged With external charger ZG 0444 optional accessory typically 5 hr Note It is not recommended to charge the battery at temperatures below 0 C 32 F or over 50 C 122 F Doing this will reduce battery lifetime CLOCK Back up battery powered clock Drift lt 0 45 s per 24 hr period Storage INTERNAL FLASH RAM NON VOLATILE For user setups and measurement data e Hardware versions 1 3 20 MB e Hardware version 4 512 MB EXTERNAL SECURE DIGITAL MEMORY CARD SD and SDHC Card For store recall of measurement data EXTERNAL COMPACT FLASH MEMORY CARD Hardware Versions 1 3 Only CF Card For store recall of measurement data USB MEMORY STICK Hardware version 4 only For store recall of measurement data Environmental WARM UP TIME From Power Off lt 2 minutes From Standby lt 10 seconds for prepolarized microphones WEIGHT AND DIMENSIONS 650 g 23 02 including rechargeable battery 30
61. ccecccccssccecsssceceessececessececsesecsesaeecssssececsseseceeaseeeseaees 25 4 5 Reverberation Time Measurements 12 ccsccccssssccecsssceceessececesssececssecsesaeeecsssseeeesseeseaaes 41 4 6 Low frequency Me aSULeMENtS cccccccecssssseccceceesseesecececeeseeassececsceeseseseeececeeseaaeseeeeeseeaaeseeecs 49 4 7 2 channel Measurements Type 2270 Only cccccccscccccssscccecsececsssceecseseceesaeecessseeeesseeecseaaes 53 4 8 Displaying RES UUlts icc ia E E a e E EERE A9 Quality Nd A OS a e a a a e spas R E AEAEE Ghee AA E RR AAO Creating a NEW Project arata ar aaa aa e a aaar a a aaa aaa a E aaa aa a aa ea aaa raais 4 11 Reusing Data from an Existing Project ccceccccccecessssseceeececeeseseeeeceeceeseaeseseescseeeaeseeseseeeeees 4 12 Annotations and Signal Recording 00000 4 13 Exporting Post processing and Reporting CHAPTER 5 SDECIICATIONS Wis sssiescsisevansssssseessisieasensscscouos decacwuecccuceesaseddesesesans cesses casdseeteasessccess dedesenetacacce se sts 69 APPENDIX A Setup PArAMEETS cciasicccveesiacieccecescnsesccectsoseSoasescenseedonssscaeesaonseseossdses sosdsesosececdeasdsaaecsensendessdee s 81 Al Input ForTypei22 70 On ci s8cisssicecceces SeGba sec uwoea Seana E bude deeeeweu todos ieriueounnedonsusvees 82 Al2 WADUE E E E TAEA E 83 Ae E i 1110 ai E E EE A A T E EE E E E E E 84 A4 Frequency Range on ccccseescccnccevscnettssetecssivacneessserbseebeicnnssesteanineendee
62. ceceesceeeeeeeeeeeeeeeeeeeeeeeeaeeeteeneeeees Partitions 20 S2ete eles csnnh Zeck et seuradeassnetith a decuerdeaseuecansuncesvnas PC Icon Periodic ROports cssessssesecesseesseseseseseseseessones Planned Measurement Task EXA mpenn ideni Planned Measurements cceeeeeeeeeeeee Planned vs Unplanned Measurements POSt PrOCOSSING sseccessresseeseesseneesesseenssetessessoeer Project Annotations 0 cece cee eeeeceseeeseeteeeeees Project Template Bat eee eeeeeeeseeeeneeeeees Q Quality INGICALOIS 0 ee cececceeeeeeteeeeeeseeseeeseeaeesseenees 61 R Range Setting tanasi dined 83 Parameters Ready for First Measurement 35 51 Ready for First Measurement Dual channel 55 Rear Socket s 24 isie asirai a eA eA Receiv Room Vol V2 oo eeeeeeceeeseeeeeeeeeeeeeeeeeeneeeeeeee Receiving ROOM sssssssessssssssssesrnssssnreennsrrnnerennesennes Receiving Room B2 Measurements 00 Receiving Room L2 Measurements at ROPOMING isieccccctitnialsecenstamadaeacmesradansed Results Displaying 3 ccccininciivecicimaneisciininnairaive Results Link Re using Data Re using Data from an Existing Project 64 Reverberation Time T2 Measurements 05 8 Reverberation Time Measurement T2 Reverberation Time Measurements T2 Building Acoustics Software BZ 7228 User Manual Reverberation Time Software Decay Tab re
63. creen A Paperclip i icon appears in the status field of the measurement and next to your project in Explorer Tap to see a list of all annotations in the project and tap i in the annotation to view the image 4 12 4 Signal Recording If you record sound while making the measurements Recording Control set to Automatic under Signal Recording parameters then the sound recording is saved together with the annotations on each measurement This is also indicated by i on the Overview tab in the line for the measurement and i a small paperclip icon in the Overview tab To capture images each time you press the Manual Event pushbutton tap EG gt Preferences gt Images gt Image Control and select Manual Event The Viewfinder setting displays what is coming through the camera lens Signal Recording is only possible in one channel It will be CA Zif the measurement is setup for a 2 channel measurement In the overview in Fig 4 43 there are annotations and or a signal recording on the first measurement Pos Tap to get alist of annotations and or sound recordings attached to the measurement on Pos1 4 13 Building Acoustics Software BZ 7228 User Manual Exporting Post processing and Reporting Measurement Partner Suite BZ 5503 is used for all communication between PC and analyzer Connect the analyzer to the PC using the supplied USB Cable Use this software to e e e e Transfer measurement data
64. e been saved but not decreased below the last measurement position Increment Source First Mic Position First Manually Only for Planned Measurement On Defines the order in which you want to do your measurements Interrupted Noise Max Decay Time 25 to The decay is based on spectra sampled every 5 ms An 205 algorithm determines when the decay is finished and then stops the measurement Under difficult measurement conditions where the automatic stop cannot be found Max Decay Time determines when to stop Automatic Save Off On Excitation Impulsive Number of Decays Ito 100 Parameter only available if Excitation nterrupted Noise Trigger Level Oto 140 dB Parameter only available if Excitation mpulsive Trigger Repeat Off Parameter only available if Excitation mpu sive On T2 Measurement Parallel Parallel measures all bands in the Spectrum Mode Serial simultaneously Seria measures selected bands and Combined Combined first measures Parallel and then Serial in an automated sequence APPENDIX A 87 Setup Parameters A 7 Signal Recording Table A 7 Signal Recording parameters Parameter Values Comment Recording Control Off Determines how recording of the measured signal is controlled Set to Automatic to start the recording when the measurement is Automatic started and record throughout the measurement Recording Quality Low This setup determines the
65. e building see Fig 2 5 The loudspeaker sound source should be positioned at an angle of 45 to the centre of the partition or wall and generating pink or white noise The outdoor level L1 is the resulting average for positions 1 to n placed at the partition and is used in the sound insulation calculations Fa ade sound insulation is then calculated from the Leq spectrum for the average outdoor level L1 average receiving room level L2 average receiving room background noise level B2 and average reverberation time T2 The B2 and T2 measurements are performed in a similar way to those described previously in Section 2 2 2 Traffic Noise Owing to the varying character of traffic noise L1 and L2 need to be measured simultaneously for each set of L1 L2 positions and the L1 L2 differences are then averaged For this reason you will need a dual channel Type 2270 to perform this task 12 Building Acoustics Software BZ 7228 User Manual Fig 2 5 Outdoors 1 Typical setup for facade sound CA insulation N measurement Y L1 AAIAAA Partition with area S Receiving Room 2 Volume V L2 A G B2 T2 070128 Q g 2 2 4 Impact Sound Level Impact Sound Level is the sound level in the receiving room from a standardised tapping machine in the source room see Fig 2 6 The sound source for L2 is a standardised tapping machine for example Br el amp Kj r s Type 3207 which is
66. e next sections and will help to introduce you to some of the terms used see Fig 2 1 a Fig 2 1 Please note Building Acoustics Software BZ 7228 User Manual Typical setup for airborne sound insulation measurement Mic Pos 1 Mic Pos 4 Mic Pos n Mic Pos n Mic Pos 3 Mic Pos n Mic Pos 3 En Mic Pos 3 Mic Pos 2 ee Mic Pos 1 Source Pos 2 Partition with area S Source Room 1 Volume V1 Receiving Room 2 Volume V2 070129 1 L1 refers to the sound level measurements made in Source Room 1 these are used in airborne and fa ade sound insulation calculations L2 refers to the sound level measurements made in Receiving Room 2 these are used in airborne fa ade and impact sound insulation calculations B2 refers to the background sound level measurements in Receiving Room 2 these are used for background level corrections in airborne fa ade and impact sound insulation calculations T2 refers to the reverberation time measurements made in Receiving Room 2 these are used in airborne fagade and impact sound insulation calculations The annotations denote where the measurement was taken For example L1 measurements are taken in Source Room 1 hence the L1 annotation and the L2 B2 and T2 measurements are taken in Receiving Room 2 hence the L2 B2 and T2 annotations In practice when making measurements in the field there are many co
67. e quality of L2 measurements Source Room Volume 0 1 to 100000 m Needed for report in some standards Source Room Floor Area 0 1 to 10000 m Used to determine quality of L1 measurements Rubber Hammer Yes No NEN and NEN 06 Impact only a 94 Building Acoustics Software BZ 7228 User Manual Table A 11 Cont Calculation Parameters Parameter Values Comment Floor Wood NEN and NEN 06 Impact Rubber Hammer Stone only Cr 10to NEN and NEN 06 Facade only 10 dB Traffic Type Road NEN and NEN 06 Facade only Rail Air Other CL 3 to NEN 06 Facade only 20 dB OILR 10to If you are measuring to the ASTM standard 10 dB set the dB level for the Outdoor Indoor Level Reduction parameter here Only available if the Fa ade task is selected OITL 10 to If you are measuring to the ASTM standard 10 dB set the dB level for the Outdoor Indoor Transmission Loss parameter here Only available if the Fa ade task is selected B 1 Building Acoustics Standards B 1 1 Overview 95 Appendix B Measurement Parameters For a complete overview of building acoustic standards see Table B 1 and Table B 2 For an overview of the calculated parameters see Table B 3 and Table B 4 Table B 1 Building Acoustics Standards Part 1 T gt 5 z a Da F i gt co g 8 E E 5 EE E
68. ed 1 1 octave or 1 3 octave spectra within the 50 5000 Hz range Measurements may be serial one frequency band at a time or parallel all bands simultaneously Please note Room acoustics is the assessment of sound quality inside a room and outside the scope of this document It is described in Hand held Analyzer Types 2250 and 2270 User Manual Chapter 14 Reverberation Time Software Optional Module 2 1 1 Tasks There are three kinds of building acoustics measurement tasks 1 Airborne Sound Insulation is the sound insulation from one room the source room to another room the receiving room 2 Fagade Sound Insulation is airborne sound insulation with the source room being the space outside a building and the receiving room being inside the building 3 Impact Sound Level is the sound level in the receiving room from a standardised tapping machine in the source room These tasks will be described in more detail in section 2 2 Reverberation time is also used in the calculation of building acoustics Determining reverberation time has two purposes determining the absorption coefficient for building materials and checking the reverberation time according to building regulations for example in stairwells classrooms and work spaces To aid understanding an illustration on how to set up airborne sound insulation measurements has been provided This will help you visualise what we will be talking about in th
69. ed each time you save data data from Ch 1 at the position you have selected and data from Ch 2 at the subsequent position Data e Cutand Paste in Overview for Planned measurements only e Reuse from project in Explorer into the current project e The date of the projects in Explorer is the date when the project was last saved e g after being opened and reviewed 4 4 Level Measurements L1 L2 and B2 4 4 1 Planned versus Unplanned Measurements This section contains descriptions on how to set up your analyzer and how to control your level measurements It also gives examples of how to perform Planned as well as Unplanned measurements The Planned measurement setup is required for the BREW and NEN NEN 06 standards and optional for the other standards It guides you through each stage of the measurement process in a logical sequence which means that you can see where you are in the process at any given time This helps to avoid confusion and can be reassuring when you are dealing with multiple microphone and sound source positions ISO 16283 requires L1 and L2 to be planned however B2 can either be planned or unplanned The Unplanned measurement setup is the one you should use if you are not working to a particular standard or you do not have to keep track of several sound source positions Or perhaps you have some previous building acoustics measurement experience and like the flexibility to follow your own procedures 4 4 2 Tri
70. eeeeeeteeeeteteeeeteneees 25 Typical Setup for Airborne Sound Insulation Measurements 4 U Unplanned Measurement cceeeeeeeeeeeeeeneeeees 25 Ena S E E cvssnecese 38 Unplanned Measurement cece eeneeeeee 43 WwW WEICOMGE eeeeeeceeeeeeeeeeeeteeeteeaeeeteeaeeeteeeeseeaeeeseeaeeeneae 3 What is a Building Acoustics Project cee 17 WIFI Sts foc se tice cs hictane ssbfovascdvesdasatneys ONES 20 Windscreen Auto Detect Windscreen Correction Parameter www bksv com Bruel amp Kj r All rights reserved BE 1799 11
71. elow the Status Field Position Selector Two smileys have been shown for illustration purposes in Fig 4 19 one is applicable to the 100 Hz band in the black line the other smiley above it is for the complete position Posi Small smileys are set below each frequency band with a potential problem The smileys are also available at the cursor readouts Tap on the smiley at the cursor readout to get detailed information about the warning For a description of status indicators and smileys see Quality Indicators on page 60 The Spectrum is shown in Fig 4 17 right 13 An empty Pos1 has been created and selected in the table Press the Save amp pushbutton and the measurement is saved at Pos The smiley is updated for the complete project in the upper line 14 Press the Start Pause pushbutton to make a Pos2 measurement The result of the measurement is shown in the black line above the table see Fig 4 20 CHAPTER 4 39 Building Acoustics Software Fig 4 20 BUILDING ACOUS ISO140 Airborne BUILDING ACOUS ISO140 Airborne Unplanned Cloud Project 007 0 L1 Cloud Project 007 i L1 measurement W lt 00 00 15 se II 00 00 15 pja Hz gt dB 108 07 dB Left Before pressing Start Pause pushbutton on a Pos2 measurement lt 100 Hz gt 17 75 dB 108 07 dB Pos 01 Right The result of the Pos2 measurement Spectrum 10 32 22 Spectrum amp 10 35 01 15 An em
72. ensee 82 Auxiliary Parameters in Reverberation Time Software 0 cce 47 Averaging Spatial cceeceeeeeeeeeceseeeeeeeeeeeeeeeeeeeseeeseeeeeneeeneeees 6 B Bee ieee oated ddd nes novel E EE 4 Background Noise Correction 0 2 eeeeeeceeeeeeeeeeeeeeeeeaeeeaeeseaeeseaeeeeeeeeeeeee Background Sound Level Measurement B2 es Bandwidth and Frequency Range sses Building Acoustics Partitions ioan vais aie ne Ae 5 Tasks 223 Building Acoustics Defined 0 ee ws Building Acoustics Measurement Procedure 6 Building Acoustics Project Template 0 26 Building Acoustics Software s s 17 NAVIGAtING stirenn iraan 17 Building Acoustics Software BZ 7228 cee 17 Building Acoustics Standards 6 95 BZ 7228 Building Acoustics Software eee 17 Cc Calculated Parameters ceceseseeceeeeereenees 97 98 Calculations csascoveiconcaiaravarestatavareravess 59 Calculations Parameters eceseeseeeeereeneeeteeees 92 Calculations Tab ececeeccesseeeeeeerseteeneeeeeenreeeeaees 59 Changing Function oo eeeecseeeeeeeeeeeeeeeeeeeeneeeneeaees 34 Changing the Number of Sources and Microphone Positions c eee eee 37 Combine Parallel and Serial Measurements in an Automated Sequence Gombined 14 lt 2 25 fia EEE Combined Tasks and Measuremenits 0 08 13 Commentary ICON ce eeeeceeeeeeeeeeeeeeeeeetireeeeeneeeaeeaees 20 Contr
73. ent BUILDING ACOUSTICS ISO Airborne COUSTICS ISO Airborne 100 Hz dB OS1 Pos1 Pos 97 1dB Os1 Pos2 OS1 Pos3 Os2 Pos1 Os2 Pos2 OS2 Pos3 LAF 100 2 dB Preset Time 00 00 10 Overview Spectrum Overview Spectrum 14 31 34 Building Acoustics Software BZ 7228 User Manual 9 Press the Save amp pushbutton The measurement is saved as S1 Pos1 The smiley is updated for the complete project on the upper line S1 Pos2 is automatically selected Fig 4 18 Fig 4 18 Overview and Spectrum tabs just before the second measurement BUILDING ACOUSTICS 100 Hz 4s1 Pos1 O S1 Pos2 Os1 Pos3 Os2 Pos1 dB Os2 Pos2 dB OS2 Pos3 Overview Spectrum 14 31 34 L1 L1 Pos 140 110 80 100 250 LAF 100 2 dB Preset Time 00 00 10 Spectrum 10 Press the Start Pause pushbutton to measure in sequence at Pos2 Pos3 etc The selection possibilities for spectrum parameters on the measurement display are listed in Table 4 1 Table 4 1 Spectrum parameters measurement display Function Graph L1 L2 B2 T2 LZF L1 L1 Pos L2 L2 Pos B2 B2 Pos T2 T20 Pos T2 T30 Pos L1 L2 B2 L1 L1 L2 B2 L2 L1 L2 B2 B2 L1 L2 B2 L1 L2 L1 L2 B2 L2 B2 L1 L2 B2 T2 Off T2 T20 T2 T30 CHAPTER 4 37 Building Acoustics Software The Overview position selector has the following options available e 1 Po
74. g Standard Input acoustics using Frequency Range Measure L1 and L2 Type 2270 Measurement Control L1 L2 and B2 Input for L1 Ch 1 Generator L1 and L2 Input for L2 Ch 2 Measurement Control T2 Input for B2 Ch 1 Generator T2 Input for T2 ch 1 Signal Recording Autorange On Geometry Channels Calculations Input Top Top Transducer 4964 UC 0 4964 UC 0 Snd Fld Corr Diff Diff Wind S Auto Off Ofer Full 23 18 02 54 Building Acoustics Software BZ 7228 User Manual 6 For 2 channel measurements there are also two independent sets of input selections youcan set channel 1 and channel 2 They are set as follows Set the Range Setting to High Range or Low Range as required The difference between the two settings is 30 dB High Range can be used to measure up to the maximum input level This is only relevant if the Measure L1 and L2 parameter is set to Simultaneously or if the Input for parameter has been set to Ch 1 and Ch 2 Simult and Autorange is set to Off Fig 4 34 C 2 channel input Measure L1 and L2 Simultaneously Ka selections for Input for L1 Ch 1 measuring building Input for L2 Ch 25 acoustics using Input for B2 Ch 1 Type 2270 Input for T2 Ch 1 Autorange Off Channels Input Top Top Transducer 4964 UC 0 4964 UC 0 Snd Fld Corr Diff Diff Wind S Auto Off Off Wind S Corr None None Range Setting High Full 4 7 2 Controlling the Measurement Using two channels in Type 2270 h
75. g 4 26 When displaying LZF you can tap on the LZF selector and select Display Reverberation Time to display the reverberation time spectra When starting a measurement the graph will automatically display the sound level spectrum and when finished it will display the reverberation time spectrum REVERBERATION TIME 0 T20 Room 100 Hz 2 kHz T20 100 Hz 2 kHz The main spectrum graph on the display the bar graph is selected using the parameter selector on the second line of the two shown above the graph LZF in Fig 4 26 The parameter selector for the main spectrum is linked to the selector on the Overview tab and the parameter selector for the main decay on the Decay tab The other spectrum on the display the one displayed as small lines above and below the bars in Fig 4 25 is selected using the parameter selector on the first line of the two shown above the graph 720 Pos in Fig 4 25 This spectrum can be used as a reference when comparing it to the main spectrum and it is linked to the parameter selector for the reference decay curve in the Decay view Smileys below the spectra if there are any are set if a smiley is present for at least one of the spectra The cursor is linked to the frequency selectors on the Overview and Decay tabs Tap on the Y axis to select e Auto Zoom to adjust the range of the Y axis for best fit of the measured spectrum Zoom In Zoom Out to adjust the zoom e Spectrum Table to display the spect
76. g the interrupted noise or impulse excitation methods as follows Interrupted Noise Method 1 Set the Escape Time tap Main Menu Eq gt Setup gt Generator T2 gt Escape Time and enter the time which allows you to vacate the measurement room and press Start Pause on the analyzer 2 The noise generator is switched on and the analyzer waits for the chosen Build up Time tap Main Menu gt Setup gt Generator T2 gt Build up Time and enter the time to allow for the sound field to reach a steady state 10 Building Acoustics Software BZ 7228 User Manual Fig 2 4 Typical reverberation time T2 measurement cycle for interrupted noise method dB Sound Level l Escape l Build up I Time _ Time About 1s Decay time a gg O paol l l Generator On lt gt Decay measurement l 060208 3 The decay measurement starts The level for the first second or so is used to identify the excitation sound level as the 0 dB reference level 4 The noise generator is switched off and the sound level begins to decay 5 The decay measurement ends when only the background noise level is measured automatically detected by the analyzer 6 Steps 2 to 5 are automatically repeated a chosen number of times and the measured decays are averaged together to reduce the uncertainty of the measurement 7 The reverberation time spectra T20 and T30 are calculated and displayed on the screen Impulsive
77. gnal Recording Option BZ 7226 is enabled with a separate license It works with all the software for Type 2250 2270 Sound Level Meter Frequency Analysis Logging Software Enhanced Logging Software and Reverberation Time Software For data storage Signal Recording requires either e SD Card e CF Card Hardware versions 1 3 e USB Memory Stick Hardware version 4 RECORDED SIGNAL A B C or Z weighted signal from the measurement transducer AUTOMATIC GAIN CONTROL The average level of the signal is kept within a 40 dB range or the gain can be fixed PLAYBACK Playback of signal recordings can be listened to using the earphone headphones connected to the headphone socket SAMPLING RATE AND PRE RECORDING The signal is buffered for the pre recording of the signal This allows the beginning of events to be recorded even if they are only detected later Sampling Maximum Sound Memory Rate kHz Pre recording s Quality KB s 8 70 Low 16 16 230 Fair 32 24 150 Medium 48 48 70 High 96 RECORDING FORMAT The recording format is 16 or 24 bit wave files extension WAV attached to the data in the project easily played back afterwards on a PC using BZ 5503 Calibration information is stored in the WAV file allowing PULSE to analyse the recordings bee Specifications Qualifier Type 7830 STANDARDS See Tables 1 and 2 under Building Acoustics Measurement Standards on page 8
78. gt 1 MQ Direct Input Max input voltage 14 14 Vpeak CCLD Input Max input voltage 7 07 Vpeak CCLD Current Voltage 4 mA 25 V TRIGGER SOCKET Connector Triaxial LEMO Max Input Voltage 20 Vpeak Input Impedance gt 47 KQ Precision 0 1 V OUTPUT SOCKET Connector Triaxial LEMO Building Acoustics Software BZ 7228 User Manual Max Peak Output Level 4 46 V Output Impedance 50 Q HEADPHONE SOCKET Connector 3 5 mm Minijack stereo socket Max Peak Output Level 1 4 V Output Impedance 32 Q in each channel Power EXTERNAL DC POWER SUPPLY REQUIREMENTS Used to charge the battery pack in the analyzer Voltage 8 24 V DC ripple voltage lt 20 mV Current Requirement Min 1 5A Power Consumption lt 2 5 W without battery charging lt 10 W when charging Cable Connector LEMO Type FFA 00 positive at centre pin EXTERNAL AC MAIN SUPPLY ADAPTOR Part No ZG 0426 Supply Voltage 100 120 200 240 V AC 47 63 Hz Connector 2 pin IEC 320 BATTERY PACK Part No QB 0061 Rechargeable Li lon battery Voltage 3 7 V Capacity 5200 mAh nominal Typical Operating Time e Single channel gt 11 h screen backlight dimmed gt 10 h full screen backlight e 2 channel gt 10 h full screen backlight Use of external interfaces LAN USB Wi Fi will decrease battery operating time Battery Cycle Life gt 500 complete charge discharge cycles Battery Aging Approximately 20 loss in
79. he T2 selector and Frequency selector in the table header row There might be a smiley to the right of the readout warning about the quality of the readout Tap on the smiley to get more detailed information about the warning 4 5 4 Spectrum The Spectrum tab shows the reverberation time spectrum from a position the average reverberation time or both The instantaneous sound level is displayed during measurements Fig 4 25 Spectrum tab 1 0 m an Ri ell Il 0 0 7 100 250 500 Spectrum Graph The Spectrum graph is the same as in the L1 L2 and B2 measurements Two 1 1 octave or 1 3 octave spectra superimposed with cursor readouts The displayed frequency range is automatically adjusted for the measured frequency range Small smileys are set below each frequency band with a potential problem The smileys are also available at the cursor readouts Tap on the smiley at the cursor readout to get detailed information about the warning Fig 4 26 Spectrum view when measuring Building Acoustics Software BZ 7228 User Manual The Spectrum Parameter Selectors above the graph select which spectra to display You can choose to display 720 Pos T30 Pos T20 or 730 If you only want one graph you can set the other to Off In addition to choosing which parameter to display you can also select Display Sound Level which will display the Z weighted spectrum LZF together with the A and C weighted broadband levels see Fi
80. ie needed 47 Overview Tab ecccceccecececeeeeeeeeeeeeeeeneeeneessees 44 Spectrum Tab kes ireen disana aieeaa 45 S Save seia a N eaa ci ena 37 Seral An A a AR aa aE 29 Serial Measurement Exam plor neroni eneee En ATEENAN 39 Serial Measurements cccccceseeeeeeteeeeeeeeeeeeeees 14 Setting the Bandwidth and Frequency Range 28 Setting the Relevant Standard and Task 27 Setting up the Instrument for Dual channel Measurements 06 53 for Single channel Measurements 26 For T2 Measurements 41 Setup Calculations wail Setup for Sound Recording 30 Setup Parameters ccccecceeeeceeeeeeeeeeeeeeeeeeeeeeeees 81 Simultaneously eee 19 24 29 53 54 55 Simultaneously in the Same Room 58 Single channel Measurement cecceeeeeees 26 Smiley Explanation cccecceeeeeeeeeereeeeeeeeeeeeeeeeeeee 64 Software Building ACOUSTICS c cece eee eects eeeeeeeees 17 Sound Field Correction cc cccccscccccsseeesseeees 82 83 Sound Insulation Air DOMeno t aai i ees Sound Level Measurement L1 Sound Level Measurement L2 Sound Recording SOU ARARAT E I pees Sound Recording Parameters ccceseeteeeees Source ROOM ssec Source Room L1 Measurements zil Source Room Floor Area 1 33 Source Room Vol V eseese 33 Sources and Microphone Positions 0 c00
81. in the same room 2 channel measurements are possible for all the functions L1 L2 B2 and T2 J 1s Chapter 3 System Overview This chapter provides an overview of the equipment and accessories used to perform building acoustics measurements using e Type 2250 or Type 2270 with Building Acoustics Software BZ 7228 single channel e Type 2270 Building Acoustics Software BZ 7228 and 2 channel Option BZ 7229 Please refer to the system overview diagram in Fig 3 1 Fig 3 1 System overview diagram 2250 or 2270 with BZ 7228 AQ 0673 ea 2734 B Power Amplifier including AKG SR 450 Receiver 300 eee os AO 0523 g o o a creo 10 pin Mic Extension Cables AO 0697 030 3m AO 0697 100 10m 4231 Calibrator i oe AR 0199 10 pin Flat Cable 4189 Microphone ZC 0032 Preamplifier UA 1317 ED Microphone Holder JP 1041 Dual 10 pole Adaptor 4292 L UA 0801 OmniPower AKG PT 450 wireless Light weight DV Sound Source UA i audio transmitter f Tripod a Wireless l Building Acoustics Software UA 1476 Wireless Remote p 7830 Remote Control Control UA 1476 Remote Receiver Control Wireless Transmitter B Receiver RRA AQ 0633 3207 Tapping Machine AO 0524 3923 Rotating Microphone Boom 4224 Sound Source o o WL 1330 LEMO 10 pole female to 7 pole Briel amp Kjaer male oO WL 1330 7 pole Briel amp Kj r female to 10 pole LEMO male For further details see Ordering Informatio
82. ing results using 101 j the Overview tab Partition Size 10m ce S1 1 1 i Beva B2 m2 2 2 3 30 3 3 4 4 l 5 5 S2 S2 j 1 1 28 2 3 3 i 4 4 zany Overview Calculations n 14 31 34 The Status Field consists of the following information when viewing results Line 1 shows the same information as that described in Status Field on page 20 Line 2 e Receiving Room Volume linked to Setup menu e Partition Area linked to Setup menu 4 8 2 Calculations The Calculations tab allows you to view the calculation results including a spectrum see Fig 4 40 The Status Field consists of the same information as the Overview tab see previous section The options for the reference spectrum J parameter on the results view are e Reference Curve e Deviations between the reference curve and the main spectrum Off The options for the main spectrum J parameter on the results view depend on the selected standard and task For example if the Standard parameter is set to SO 16283 and the Task parameter is set to Airborne the options are e D Dn e DaT e R R Fig 4 40 Viewing calculation results using the Calculations tab Building Acoustics Software BZ 7228 User Manual 250 500 10 30 49 In the area below the graph area three single values can be shown The options for these lines depend on the standard selected and the selection for the main spectrum J parameter The
83. into the portfolio You will also become familiar with some terms used in this manual that apply to analyzers in general This manual provides instructions for e Setting up your hand held analyzer for building acoustic measurements e Measuring building acoustics e Looking at your results This manual assumes that you are familiar with the concepts of measuring sound using a microphone and some form of sound level meter analyzer 1 1 How to Use this Manual 1 1 1 Conventions Used in this Manual Analyzer refers to Type 2250 or Type 2270 if the description is valid for both types Instructions and descriptions that refer to the analyzer pushbuttons are shown with the pushbutton icons as seen on the analyzer See Chapter 2 for a list of pushbutton icons and their functions Icons Buttons and Tabs Used on the Screen Indicated by bold type face for example tap Main Menu icon Parameter Values Text and Variables Parameter values instructions descriptions appearing on the screen and variables are indicated by italics for example nterna Disk 2 Building Acoustics Software BZ 7228 User Manual Menu Parameters and Screen Navigation Indicated by bold type face for example Setup gt Frequency Settings gt BB Peak Keyboard Entries Keyboard entries and combinations are indicated by bold type face within angle brackets for example lt Ctrl b gt means you should press the Ctrl button and b button at the same ti
84. itions 10 L1 No of Micr Pos 1 to Only for Planned Measurement On per Source 10 The number can be increased after the first measurements have been saved but not decreased below the last measurement position L2 No of Micr Pos Ito Only for Planned Measurement On per Source 10 The number can be increased after the first measurements have been saved but not decreased below the last measurement position Increment Source First Only for Planned Measurement On Mic Position First Manually Defines the order in which you want to do your measurements Preset Time 00 00 00 to 01 00 00 Automatic Save Off On Level Measurement Parallel Parallel measures all bands in the Spectrum Mode Serial simultaneously Serial measures selected bands and Combined Combined first measures Parallel and then Serial in an automated sequence s Building Acoustics Software BZ 7228 User Manual A 6 Measurement Control T2 Table A 6 Measurement Control T2 parameters Parameter Values Comment Planned Off For Planned Measurement 07 you can define the Measurement On number of source positions and microphone positions per source otherwise the measurements are made from Pos 1 and forward No Of Sources 1 to Only for Planned Measurement On Positions 10 No of Micr Pos per J to Only for Planned Measurement On Source 10 The number can be increased after the first measurements hav
85. k whether the standard deviation of the averaged sound spectra in the source and receiving rooms is too big or not The check is done according to the method specified in ISO 140 14 2004 A 5 If the standard deviation in a frequency band is greater than twice the theoretical expected value then the band is marked with a yellow smiley When the smiley is tapped the following explanation appears L1 or L2 High Standard Deviation 24 Rubber Hammer select Yes if you are measuring to the NEN or NEN 06 standard otherwise select Wo Only available if the mpact task is selected 25 Floor select Wood or Stone whichever is applicable Only available if the mpact task and Rubber Hammer parameter are selected and you are measuring to the NEN or NEN 06 standard 26 Cr set the cB level for Cr here if you are measuring to the NEN or NEN 06 standard Only available if the Facade task is selected 27 Traffic Type select Road Rail Air or Other whichever is applicable when you are measuring to the NEN or NEN2006 standard Only available if the Facade task is selected 28 CL set the dB level for CL here if you are measuring to the NEN 06 standard Only available if the Facade task is selected 29 OILR Correction set the dB level for OILR correction here if you are measuring to the ASTM standard Only available if the Facade task is selected 30 OITL Correction set the dB level for OITL correction here
86. l L2 receiving room background noise level B2 and average reverberation time T2 see Fig 2 1 The sound source should be an omnidirectional loudspeaker emitting either pink or white noise depending on measurement conditions Source Room L1 Measurements Place the sound source in the source room to make the L1 sound level measurements see Fig 2 1 Several measurement points should be used for the sound source and the microphone You should choose two sound source positions and a minimum of five microphone positions The source room level L1 is the resulting average for positions 1 to n It is used in the sound insulation calculations Receiving Room L2 Measurements L2 level measurements are made in the receiving room see Fig 2 1 As with L1 make a series of measurements at different positions for each sound source position in the source room in order to allow for sound pressure variations The resulting averaged spectrum is used in the calculations Typical L1 and L2 Measurement Cycle The different stages of a typical Ll and L2 measurement cycle are illustrated in Fig 2 2 and described below 1 Set the Escape Time tap Main Menu gt Setup gt Generator L1 and L2 gt Escape Time and enter the time which allows you to vacate the measurement room and press Start Pause on the analyzer 2 The noise generator is switched on and the analyzer waits for the chosen Build up Time tap Main Menu Eq gt Setup gt Gener
87. l Calibration 2270 K CEF Periodic Calibration HARDWARE MAINTENANCE 2250 2270 EW1 Extended Warranty one year extension Types 2250 2270 CHAPTER 5 79 Specifications Compliance with Environmental Standards C The CE marking is the manufacturer s declaration that the product meets the requirements of the O applicable EU directives O K RCM mark indicates compliance with applicable ACMA technical standards that is for AT I telecommunications radio communications EMC and EME China RoHS mark indicates compliance with administrative measures on the control of pollution caused by electronic information products according to the Ministry of Information Industries of the People s Republic of China WEEE mark indicates compliance with the EU WEEE Directive Safety EN IEC 61010 1 ANSI UL 61010 1 and CSA C22 2 No 1010 1 Safety requirements for electrical equipment for measurement control and laboratory use EMC Emission EN IEC 61000 6 3 Generic emission standard for residential commercial and light industrial environments EN IEC 61326 Electrical equipment for measurement control and laboratory use EMC requirements CISPR 22 Radio disturbance characteristics of information technology equipment Class B Limits IEC 61672 1 IEC 61260 IEC 60651 and IEC 60804 Instrumentation standards Note The above is only guaranteed using accessories listed in this Product Data EMC Immunity EN IEC 61000 6 2 Generic standard
88. ll floor or window Partition is the common term used in all tasks 2 1 3 Field versus Laboratory Measurements Field Measurements Measurements in the field are performed in situ on partitions of buildings The results are used to document conformance to building regulations In field measurements sound and vibration propagate not just via the partition under investigation but also via other partitions structures and leaks This propagation is called flanking transmission Laboratory Measurements Measurements in the laboratory are made on building elements such as wall panels or windows mounted in special test rooms designed and tested to prevent flanking The measurements follow uniform and strict procedures and the measuring equipment is usually permanently installed The results are used by manufacturers to document the performance of their products 2 1 4 Correction for Background Noise If the background noise level B2 comes within 15 dB of the receiving room level L2 it starts affecting the measured L2 level Depending on the standard correction is made to L2 for the influence of the background noise level The correction varies depending on the level difference L2 B2 When the background noise level comes too close to the receiving room level a fixed 6 Building Acoustics Software BZ 7228 User Manual correction to L2 is made and the measurement results are marked to indicate that a correction has been made
89. ll scale value on the Y axis e Show Hide Regression Line to show hide the regression line and the evaluation range for the main decay together with the status indicator C e Close to exit the drop down menu CHAPTER 4 49 Building Acoustics Software 4 6 Low frequency Measurements ISO 16283 sometimes requires low frequency measurements in order to correct spectra for rooms where the sound field may not be approximated to a diffuse sound field particularly in rooms with a volume smaller than 25 m and where low frequency content from 50 to 80 Hz is of interest Table 4 2 Table 42 Room Size Functions that require low Function frequency measurement Source Room lt 25 m Receiving Room lt 25 m L1 Yes No L2 No Yes B2 No Yes T2 No Yes The measurements consists of e Aset of Ll measurements in a minimum of four corners where V1 lt 25 m or e AsetofL2 and B2 measurements in a minimum of four corners and a T2 measurement that is not measured in a corner where V2 lt 25 m or All the above measurements if both V1 and V2 lt 25 m Please note When measuring T2 ISO 16283LF Bandwidth is locked to 1 l octave and Bottom Frequency is locked to 63 Hz Fig 4 29 An example of corner measurement positioning given in ISO 16283 1 where 1 represents walls 2 represents the ceiling and distance d is between 0 3 and 0 4m 150285 4 6 1 Using the Low frequency Measurement Resu
90. lts Please note There is no Results gt link to click The low frequency measurement results are only used for corrections for ISO 16283 measurements Low frequency measurement measurements can be performed before or after the ISO 16283 measurement 50 Building Acoustics Software BZ 7228 User Manual To perform the Low frequency measurement after the ISO 16283 measurement 1 Set up your analyzer for an ISO 16283 measurement as described in section 4 4 with the following amendments The Main Menu gt Setup gt Geometry parameter must have one room volume that is less than 24 5 m The Main Menu gt Setup gt Frequency Range gt Bottom Frequency must be set to 50 Hz 2 Perform the ISO 16283 measurement 3 When the last measurement position has been saved press the Reset pushbutton If both conditions in step 1 have been met pressing will trigger a pop up dialog 4 Tap Yes to create and open a low frequency project This will trigger a notice pop up window advising that the generator settings remain unchanged 5 Tap OK 6 Set up and perform the low frequency measurement as normal Please note e The generator settings for L1 and L2 must be identical for the ISO 16283 and ISO 16283LF projects e The ISO 16283LF project must contain valid data To perform the low frequency measurement first 1 Set up and perform the ISO 16283LF measurement described in section 4 6 2 2 Set up and perform the ISO 162
91. ly then the position will not automatically change after you save You have to select a new position before every save operation Changing the Number of Sources and Microphone Positions For planned measurements you can increase and decrease the number of source positions and the number microphone positions per source in the setup Please note You cannot delete any positions you already have measured 38 Building Acoustics Software BZ 7228 User Manual 4 4 7 Example of an Unplanned Measurement Set the Planned Measurement parameter to Off if you just want to measure at a number of positions without keeping track of the relation between source and microphone positions and just want to measure from Posi and forwards Please note This is not available for the standards BREW NEN NEN 06 and ISO 16283 12 Press the Start Pause pushbutton to make a Posi measurement The result of the measurement is shown in the black line above the table see Fig 4 19 Fig 4 19 BUILDING ACOUS 150140 Airborne BUILDING ACOUS ISO 140 Airborne Unplanned loud Project 007 u loud Project 007 u measurement E lt 00 00 00 ie m lt 00 00 00 oie Result gt Left Before pressing Start Pause pushbutton on a Pos1 measurement Right The result of the Pos1 measurement before saving Spectrum Spectrum m 10 24 11 10 24 11 Please note Ifasmiley appears during the measurement it will appear in the black line b
92. matically step to the next selected band This will continue until all selected bands have been measured Press the Save amp pushbutton to save and merge the bands with the measurement you have already done be sure to select the right position before saving CHAPTER 4 Building Acoustics Software Please note a You need to measure the same bands serially at all the positions you have measured for both L1 and L2 If you do not measure them serially a red smiley warns you of the problem Similarly a yellow smiley informs you which bands have been measured serially Combine Parallel and Serial Measurements in an Automated Sequence You can speed up the measurement process if you start investigating whether you need to use serial measurements at certain frequency bands or not If you need to measure some bands serially then you can select tap Main Menu gt Setup gt Measurement Control L1 L2 and B2 gt Level Measurement Mode and select Combined Then select the bands you want to measure serially like you did in the previous section Pressing the Start Pause pushbutton will now make anormal parallel measurement and then do the serial measurements all in an automated sequence Please note Serial measurements can also be used to redo L1 and L2 measurements at frequencies where the L1 band levels at adjacent bands differ by more than 6 dB for ISO 140 or 8 dB for ISO 16283 4 5 Reverberation Time Measurements
93. me 1 1 2 Beginners Before you read the rest of this manual read Briel amp Kj r s primer on Measuring Sound This will give you a basic idea of acoustic measurements It can be found on the www bksv com website by typing Primer in the search window The website also contains lots of other information you might find useful Further information is available in the online help installed on the analyzer 1 1 3 Experienced Users of Acoustic Measurement Equipment The manual is designed so that you do not have to read all of it to be able to use the analyzer It is built around the most frequently used operations these are as follows e Building Acoustics Measurements Chapter 2 System Connections Chapter 3 e Building Acoustics Software Chapter 4 e Specifications Chapter 5 e Setup Parameters Appendix A e Measurement Parameters Appendix B However it is recommended that you read the entire manual for appropriate procedures on how to use the analyzer to obtain accurate sound level measurement results 3s Chapter 2 Building Acoustics Measurements This chapter describes how to perform building acoustics measurements using e Type 2250 or Type 2270 with Building Acoustics Software BZ 7228 single channel e Type 2270 Building Acoustics Software BZ 7228 and 2 channel Option BZ 7229 2 1 Building Acoustics Defined Building Acoustics is the assessment of sound insulation in buildings The assessment is based on measur
94. n on page 73 Not supplied by Briel amp Kj r 070122 3 16 Building Acoustics Software BZ 7228 User Manual 4 1 4 2 7 Chapter 4 Building Acoustics Software Building Acoustics Software BZ 7228 enables you to measure building acoustics using your analyzer 2 channel Option BZ7229 is required for Type 2270 Check the About screen to see whether you have a license to run this module To access the About screen tap the Help icon J then tap About What is a Building Acoustics Project When using Building Acoustics Software BZ 7228 it will be useful to know what a building acoustics project consists of before you start to measure A Building Acoustics project contains data for one Partition and one Task setup parameters a number of Leg sound level spectra background level spectra and reverberation time spectra The data are categorised by means of type and location for example room 1 source room room 2 receiving room etc In a project there are up to four categories of data e L1 source room sound level spectrum e 2 receiving room sound level spectrum e B2 receiving room background noise sound level spectrum e 72 receiving room reverberation time spectrum The four categories of data are referred to as Functions so to measure L1 for example set Function to LZ or if L1 and L2 data are measured simultaneously 2 channel measurements Type 2270 only set Function to 1 amp 2 N
95. ng Acoustics Software BZ 7228 User Manual Fig 4 41 Viewing smiley explanation 20 100 250 4 10 Creating a New Project You create a new project by selecting a Building Acoustics template If you already have a Building Acoustics project open and no unsaved data you can press the Reset pushbutton and create a new project based on the current project template 4 11 Reusing Data from an Existing Project With Explorer it is possible to copy one or more functions from one project to the current project For example if you want to reuse or copy T2 from Project 001 to the current project 1 Ensure your current project is a building acoustics project single or 2 channel 2 Select Explorer to get a list of all projects 3 Locate the Building Acoustics project from which you want to reuse data in this example Project 001 4 Tap on Project 001 in the Explorer list and select Reuse Data from the drop down list that appears see Fig 4 42 left 5 Anew drop down list appears showing the functions that are possible to reuse Select Copy T2 from the list see Fig 4 42 right The function you copied T2 appears in the current project CHAPTER 4 65 Building Acoustics Software Fig 4 42 EXPLORER Re using data Left Tapping on Project 001 in the Explorer list 2 2008 S Right Selecting the i j2 2008 16 09 function to copy into your project 2 2008 15 53 11 07 41 Please note If you are using the A r
96. nsiderations to be taken into account while making building acoustic measurements For example is the room empty or furnished large or small regularly or irregularly shaped all these things affect the reflection of sound within the room and change the sound field in the room CHAPTER 2 5 Building Acoustics Measurements This can cause variations in sound pressure level within the source room so measurements are normally made at several points in the room You might choose for example two sound source positions and three microphone positions see Fig 2 1 The resulting averaged spectrum is used in the sound insulation calculations Similarly a series of measurements are made at different positions in the receiving room to allow for sound pressure variations The resulting averaged spectrum is used in the impact or sound insulation calculations The sound insulation calculations are then made using combinations of the above values according to a wide range of international standards see section 2 2 1 and section 4 2 1 Please note In some standards the L1 and L2 levels are not averaged for each room separately irrespective of sound source Instead each level measurement is identified as belonging to one particular source Averaging is made in two steps e Averaging L1 L2 for each source e Averaging L1 L2 contributions 2 1 2 Partitions Sound insulation refers to a specific separating part of a building for example a wa
97. nt it will appear in the black line below the Status Field Position Selector Small smileys are set below each frequency band with a potential problem The smileys are also available at the cursor readouts Tap on the smiley at the cursor readout for detailed information For a description of status indicators and smileys see Quality Indicators on page 60 BUILDING ACOUS ISO 16283LF Airborne BUILDING ACOUS ISO 16283LF Airborne J 74 80Hz 108 18 dB ai 80Hz 108 53 dB L1 Pos S1 Pos1 100 60 20 D00000 DfES 9 Press the Save amp pushbutton The measurement is saved as 1 Pos1 The smiley is updated for the complete project on the upper line 52 Pos2 is automatically selected to indicate the next measurement position Fig 4 18 Fig 4 32 Overview and Spectrum tabs just before the second measurement BUILDING ACO 6 LF Airborne 3LF Airborne L1 Pos 80Hz 116 35 dB 1 25 kHz gt LCF 141 71 dB LAF 143 24 dB Spectrum Spectrum m 11 48 57 10 Press the Start Pause pushbutton to measure in sequence at Pos2 Pos3 etc 11 When the L1 measurements have been done change the function to L2 B2 or T2 and continue measuring in the same way as described above until all functions have been measured CHAPTER 4 53 Building Acoustics Software Please note The B2 function has no Planned source microphone position sequence you just measure it in a number of positi
98. o an archive in the cloud for storage or easy synchronization with Measurement Partner Suite BZ 5503 Specifications Building Acoustics Software BZ 7228 Specifications apply to BZ 7228 unless otherwise stated BZ 7229 2 channel Option is for Type 2270 only STANDARDS Conforms with the relevant parts of the following e IEC 61672 1 2013 Class 1 e IEC 60651 1979 plus Amendment 1 1993 02 and Amendment 2 2000 10 Type 1 e ANSI S1 4 1983 plus ANSI S1 4A 1985 Amendment Type 1 e IEC 61260 1 2014 1 1 octave Bands and 1 3 octave Bands Class 1 e IEC 61260 1995 07 plus Amendment 1 2001 09 1 1 octave Bands and 1 3 octave Bands Class 0 e ANSI 1 11 1986 1 1 octave Bands and 1 8 octave Bands Order 3 Type 0 C e ANSI 1 11 2004 1 1 octave Bands and 1 3 octave Bands Class 0 e ANSI ASA 1 11 2014 Part 1 1 1 octave Bands and 1 3 octave Bands Class 1 e ISO 16283 ISO 140 SS DIN Onorm BS BREW Sia UNI NF S31 NBE NEN NEN 06 ASTM see tables under Building Acoustics Measurement Standards on page 8 Note The International IEC Standards are adopted as European standards by CENELEC When this happens the letters IEC are replaced with EN and the number is retained Type 2250 2270 also conforms to these EN Standards CHANNELS TYPE 2270 ONLY All measurements are made from either Ch 1 or Ch 2 or both simultaneously boa TRANSDUCERS Transducers are described in a transduce
99. oise will set the analyzer for averaging the differences L1 L2 BZ 7229 only Noise Type Pink The type of noise from the internal generator The White bandwidth of the noise will be adjusted to the frequency range from Bottom Frequency to Top Frequency Level re 1 V 80 0to 0 0 dB This sets the internal noise generator attenuation in dB referenced to 1 V This level stays at the set level irrespective of the frequency range Escape Time Oto 605 Set the Escape Time to allow the operator to leave the room before the generator is turned on and the measurement starts Build up Time lto 10s Set Build up Time to allow the sound pressure in the room to settle after the sound source is switched on Sound Source Unknown This setting optimizes the frequency response of the Type 4292 Optimum Type 4295 Optimum Type 4296 Optimum Type 4292 Flat Type 4295 Flat Type 4296 Flat internal generator output to the connected sound source The Flat setting optimizes the output for a flat power response and the Optimum setting optimizes the power difference between adjacent 1 1 or 1 3 octave bands while maintaining a boost at low frequencies Select a type matching your sound source Type 4292 or 4296 OmniPower Sound Source Type 4295 OmniSource Sound Source Select Unknown if you are using another sound source or do not want to correct the frequency response A 9 Generator for T2 Table A 9 Generator for T2 Parameter
100. olling the Reverberation Time Measuremert 33 43 Controlling Dual channel Measurements Type 2270 Only cccecscscsesseeseeseeeeseeeneeeeenees Controlling the Measurement eceseeeeeeereenees Conventions Used in this Manual vs Correction Filters uaina wna dine Correction for Background Noise eeeeeeeseeeeeeee Creating a New Project essees D Detay rirni r a acetone 73 Decay Graph ce eeeecceseeeceeeeeeeeeneeeeeeeeeeeeaeeeeeeaeeaes 47 Decay Graphs in Reverberation Time Software 47 Decay Fab enans ai ea e aiai 44 47 Decay Tab in Reverberation Time Software 47 Decay View T2 ccesccccsecsesssccossesseestecsssenseresseeees DetectOrs 2se lade ei Ae AREER Display Reverberation Time Displaying Results Building Acoustics Software BZ 7228 User Manual Displaying the Results in Reverberation Time Software c cee 44 Dual channel Measurements Type 2270 Only 53 E Example of a Planned Measurement Task 34 Example of a Serial Measurement eee 39 Example of an Unplanned Measurement 38 EXpOrt Ng joes cncscck een tensa cece elec tease teSegtat at vapasneabsceen 67 F Fa ade Sound Insulation c cccceeeeeeeeeeees 3 11 Fagade Sound Insulation Measurement SOUP opilosti aieia 12 F ado ask iccscrsecssreaveccutbarascsetsneascssneccctivarssvedss 19 Field Measurement
101. on page 87 Recordings will contain the microphone signal from when you press the Start Pause pushbutton until the measurement stops The recording will be attached to the measurement as an annotation Please note Signal Recording requires a license for the Signal Recording Option BZ 7226 and you may also need a memory card for storing the data CHAPTER 4 31 Building Acoustics Software Setup Calculations Calculations parameters Fig 4 14 can be set as required they are as follows fe Serre Setup for Calculations Geometry eito LF Project None Ref Curve Increment 1dB Ensemble Averaging No To 05s Calculate using T20 Correct for Background Noise Yes L1 Check 6 dB Rule No L1 L2 Check Std Deviation No Rubber Hammer No Floor Wood Cr 0 dB 16 LF Project Enter the project name for example Project 007LF of the project containing the low frequency measurement data see section 4 6 for more information if required 17 Ref Curve Increment set to 1 dB to shift the reference curve in steps of 1 dB when calculating the result parameters This is the recommended way of operation for reporting correct result parameters as required by the standard Set to 0 1 dB to shift the reference curve in steps of 0 1 dB when calculating the result parameters This is the recommended way of estimating the uncertainty of the results Results are displayed with 0 1 dB resolution Please note The paramete
102. ons 4 7 2 channel Measurements Type 2270 Only 4 7 1 Setting up the Instrument for 2 channel Measurements 1 Select the 2 Ch B ACOUSTICS Project Template The Project Template is displayed on the black bar at the top of the screen If it does not display 2 Ch B ACOUSTICS tap the black bar and select 2 Ch B ACOUSTICS from the drop down menu that appears Please note 2 channel measurements require a license for BZ 7229 2 Tap Eq gt Setup and select the Full tab Input Selections For 2 channel measurements setting up the analyzer is the same as for single channel measurements see section 4 4 4 apart from the following input parameters 3 Set the Measure L1 and L2 parameter to either Simultaneously or Separately depending on whether you want to measure L1 and L2 at the same time in the source and receiving room or one after the other see Fig 4 33 4 Set the Input for L1 Input for L2 Input for B2 and Input for T2 parameters to the required input channel either CA 1 or Ch 2 depending on which one you are using or to Ch 1 and Ch 2if you want to measure two positions simultaneously 5 Set the Autorange to On for autoranging Ch 1 and Ch 2 or set it to Off for manually setting the range This is only relevant if the Measure LI and L2 parameter has been set to Simultaneously or if the Input for parameter has been set to Ch 1 and Ch 2 Fig 4 33 2 channel Input setup Input Input for measuring buildin
103. ors with status information like Overload Curvature in etc extensive list of Status information Quality Indicators are available on reverberation time spectra for each frequency band and as overall quality indicators for each measurement position and for the averaged result Reverberation Time Range Max 30 s min 0 1 0 7 s depending on bandwidth and centre frequency Manual Data Entry A T2 value may be entered in any frequency band of a measured spectrum Measurement Displays OVERVIEW Table of measurement positions for each function L1 L2 B2 or T2 with readout for selectable frequency band on each position together with quality indicator Positions can be included excluded from average SOUND LEVEL SPECTRUM LZF spectrum plus A and C broadband bars Lzeq spectrum for L1 Pos L2 Pos B2 Pos L1 L2 B2 L1 L2 L2 B2 Y axis Range 5 10 20 40 60 80 100 120 140 or 160 dB Auto zoom or auto scale available Cursor Readout of selected band quality indicator for each frequency band REVERBERATION TIME SPECTRUM One or two spectra can be displayed Y axis Range 0 5 1 2 5 10 or 20 s Auto zoom available Cursor Readout of selected band quality indicator for each frequency band SPECTRUM TABLE One or two spectra can be displayed in tabular form DECAY Decay curve for a position or the room average available for each frequency band if Ensemble Average selected Display of evaluation range and regression
104. otherwise see 2 channel Measurements Type 2270 Only on page 53 Setting up the Instrument for Single channel Measurements 1 Select the BUILDING ACOUSTICS Project Template The Project Template is displayed at the top of the screen 2 Tap Main Menu Eq gt Setup then select the Full tab Input Selections For single channel measurements set the Input parameters to those shown in Fig 4 9 Input Standard Fig 4 9 Single channel Input setup for measuring building acoustics Setting the Relevant Standard and Task a Frequency Range Measurement Control L1 L2 and B2 Ee Generator L1 and L2 Measurement Control T2 Generator T2 Signal Recording Geometry Calculations CHAPTER 4 Building Acoustics Software SETUP Se siit y Input Input for L1 Ch 1 Input for L2 Ch 1 Input for B2 Ch 1 Input for T2 Ch 1 Input Ch 1 Input Top Socket Transducer 4964 UC 0211 0 Sound Field Correction Diffuse field Nindscreen Auto Detect off Windscreen Correction None Input Ch 2 Full z The Standard parameter allows you to set the relevant standard for your building acoustic measurement various options are available see Appendix A for details 3 Set the Standard parameter in the example in Fig 4 10 SO 16283 has been selected Fig 4 10 Setting the Standard and Task for building acoustics measurements Standard ISO 16283 Task Airborne Frequency Range Measurement Control L
105. parameter selector in the second line of the two shown above the display 730 Pos in Fig 4 28 The parameter selector for the main decay is linked to the selector on the Overview tab and the parameter selector for the main spectrum on the Spectrum tab The other decay on the display displayed as a dashed line is selected using the parameter selector in the first line of the two shown above the display 720 Pos in Fig 4 28 This decay can be used as a reference when comparing it to the main decay and it is linked to the parameter selector for the reference spectrum on the Spectrum tab The Frequency band selector with decrement K and increment Bg buttons as well determines the frequency band of the decay curves The frequency band selector is linked to the spectrum cursor and the frequency band selector on the Overview tab Just below the parameter selectors on the right side of the view area the value of a single status indicator is displayed C xx This is the curvature indicator and ifit shows above 10 the status indicator is set meaning Decay is bent For more details on status indicators and smileys see Quality Indicators on page 60 Tap on the Y axis to select e Auto Zoom to adjust the range of the Y axis for best fit of the measured spectrum Zoom In Zoom Out to adjust the zoom e Auto Scale to select the best scaling for viewing the spectra without adjusting the zoom e Scale Up Scale Down to adjust the fu
106. placed in the source room to simulate footsteps The sound source used for T2 is interrupted noise or impulsive noise Impact Sound Level is then calculated from the Lzeq spectra for average receiving room level L2 reverberation time T2 and receiving room background noise level B2 Please note All spectra average L2 B2 and T2 are measured as the average of several source microphone positions The L2 B2 and T2 measurements are performed in a similar way to those described previously in section 2 2 2 CHAPTER 2 13 Building Acoustics Measurements Fig 2 6 Typical setup for impact sound level measurement Source Room Pe ee ee Partition uyvuy E Receiving Room 2 Volume V G L2 O B2 T2 a of ann tnt j mt Bak j anms 070127 Q 2 2 5 Combined Tasks and Measurements Often more than one partition in a room is investigated more than one task performed for the same room or partition or several physically identical rooms in a building are measured This means some parameters need be measured only once then reused in the calculations for several partition tasks or rooms An example is shown in Fig 2 7 The need for good bookkeeping with metadata and annotations is evident Type 2250 2270 supports metadata annotations and the reuse of partition data see Chapter 4 for more information Fig 2 7 2 2 6 2 2 7 Building Acoustics Software BZ 7228 User Manual Typi
107. pty Pos2 has been created and selected in the table Press the Save amp pushbutton and the measurement is saved at Pos2 The smiley is updated for the complete project in the upper line This will be repeated for every other position in your measurement sequence Unlike the planned measurement the next position is not selected when pressing the Save amp pushbutton With a Planned Measurement pressing Start will always suggest a new position one higher than the number of measured positions Manual Selection of Measurement Position If you select another measurement position and Automatic Save is Off the Save amp pushbutton will save at that position This will always be at a position that was measured earlier and contains data A pop up window will then appear to warn you about overwriting data 4 4 8 Example of a Serial Measurement Assuming you have made either a Planned section 4 4 6 or an Unplanned section 4 4 7 Measurement Task then maybe at some frequencies you haven t been able to get a sufficient signal to noise ratio This will show up at frequencies in the L2 function if the level of the L2 band is too close to the level of the B2 band background noise see Fig 4 21 In this example you can see that the B2 level is at 55 9 dB and this is too close to the L2 level at 60 1 dB so a yellow smiley is generated If you click the smiley you will be informed that the background noise level is too high Then you either have
108. r database with information on Serial Number Nominal Sensitivity Polarization Voltage Free field Type CCLD required Capacitance and additional information The analogue hardware is set up automatically in accordance with the selected transducer CORRECTION FILTERS For microphone Types 4189 4190 4191 4193 4950 4952 and 4964 BZ 7228 is able to correct the frequency response to compensate for sound field and accessories Broadband Analysis DETECTORS A and C weighted Broadband detectors with Fast exponential time weighting Overload Detector Monitors the overload outputs of allthe frequency weighted channels Underrange Detector Monitors the under range of all the frequency weighted detectors Underrange is set if level is below lower limit of Linear Operating Range Type 2270 Detectors available for both Ch 1 and Ch 2 MEASUREMENTS Lar and L for Display as Numbers or Quasi analogue Bars MEASURING RANGES When using Microphone Type 4189 Dynamic Range From typical noise floor to max level for a 1 kHz pure tone signal A weighted Single Range 16 6 to 140 dB High Range 28 5 to 140 dB Low Range 16 6 to 110 dB Primary Indicator Range In accordance with IEC 60651 A weighted Single Range 23 5 to 123 dB High Range 41 7 to 123 dB Low Range 23 5 to 93 dB Linear Operating Range In accordance with IEC 61672 A weighted 1 kHz Single Range 24 8 to 140 dB High Range 43 0 to 140 dB Low Range 24 8
109. r has no effect for NEN and NEN 06 standards See section 4 8 2 18 Ensemble Averaging set to Yesto average decays from all positions Average parameters such as T20 are then calculated based on the ensemble averaged decay so you can display the average decay If set to Vo the Avg parameters are just averages of reverberation times and no average decay is available 19 TO the reference reverberation time typically 0 5 s but it may vary with standards 20 Calculate Using use this parameter to specify which of the measured reverberation time values to use in the calculations If T30 is specified and available then T30 is used otherwise T20 is used 21 Correct for Background Noise use this parameter to specify whether L2 should be corrected for the background noise B2 or not Building Acoustics Software BZ 7228 User Manual 22 L1 Check dB Rule 6 if ISO 140 is selected and V 8 if ISO 16283 is selected select Yes if you want to check whether the sound spectrum in the source room has differences in level greater than 6 dB between adjacent 1 3 octave bands or not The check is done according to the method specified in ISO 140 4 1998 6 2 Ifa difference greater than 6 dB is found then the bands are marked with a yellow smiley When the smiley is tapped the following explanation appears L1 gt N dB difference to adjacent band 23 L1 L2 Check Std Deviation select Yes if you want to chec
110. rameters ISO DIN ONORM Standard UNI BS BREW ss Sia 2006 NF Basic seared ISO 140 ISO 140 NF Standards ISO 717 ISO 717 ISO 717 31 05x Airborne D Dn DnT R R ua Ae D DnT R Dw Dw C Dw Ctr Dnw Dnw C Dnw Ctr Dw8 DnATrose Calculated DnTw R w or Rw DnTw8 DnATroute Parameters C Ctr R w8 See Rrose C50 3150 C50 5000 Rw8 Rroute C100 5000 tCtrso 3150 Ctr100 5000 Ctr 50 5000 R 45 R tr s Dis 2m Dlis 2m n ISO DnT45 Facade Dis 2m nT Dtr 2m See ISO plus DnTtr Dtr2m n Dtr 2m nT Dis 2m w Dls 2m n w Dls 2m nT w Dls 2m nT w C Dls 2m nT w Ctr Dtr 2m w D45 nT Calculated eee a ae Dls 2m nT w C Cv DnATroute45 Parameters AT EER Dtr 2m nT w C Cv DnATroute Dir emnt Weer D45 nT w Ctr Cv R 45 w or R tr s w C Ctr C50 3150 C 50 5000 C 100 5000 Ctr50 3150 Ctr 100 5000 Ctr 50 5000 gt ISO Impact L nT Ln plus See ISO LnT Ln Calculated L nw L nTw or Lnw res LnAT Parameters Ci Ci 50 2500 Lnw8 LnA ISO 16283 Additional low frequency measurement procedure for low frequencies in small rooms The Lcorner and Lp results are used for calculating and displaying the final results 7 98 Building Acoustics Software BZ 7228 User Manual Table B 4 Calculated Parameters Part 2 Standard NBE CTE NEN NEN 06 ASTM ASTM Basic NEN NEN E336 ISO 140 ISO 140 1007 Standards 5077 5077 2006 E966 E1332 P ISO ISO NR NNR Airborne plus plus DnT DnT FTL DA BA
111. rborne task is shown in Fig 4 1 see also Setting the Relevant Standard and Task on page 27 The options are as follows e Airborne e Impact e Fa ade When a project contains data then the available Task options are reduced to those compatible with the data 4 2 3 Function Selector The Function selector is located in the first line of the Status Field see Fig 4 2 The options are determined by the selected task and whether L1 and L2 are measured simultaneously Type 2270 only Fig 4 2 Function Selector options BUILDING ACOUS ISO If Task is set to Airborne or Fa ade and L1 and L2 are measured separately the options are e LI e L2 e B2 e 72 If Task is set to Airborne or Fa ade and L1 and L2 are measured simultaneously Type 2270 only then the options are e LI amp L2 e B2 e 72 Building Acoustics Software BZ 7228 User Manual If Task is set to mpact the options are 4 2 4 LZ B2 T2 Status Field The status field contains various information regarding the current measurement see Fig 4 3 Fig 4 3 E Status Field L1 Status Field S1 Pos1 S1 Pos2 118 4 dB S1 Pos3 a si Poss O S1 Pos5 O S2 Pos1 dB QO S2 Pos2 dB O S2 Pos3 O S2 Pos4 Overview Spectrum 21 10 29 Line 1 Project name and data path tapping on data path opens the Explorer see section 4 11 Smiley for the Project if applicable PC amp connected to Measurement
112. rement Control L1 L2 and B2 Planned Measurement on No of Sources Positions 2 L1 No of Mic Pos per Source 55 L2 No of Mic Pos per Source 5 Increment Mic Position First Preset Time 00 00 10 Automatic Save off Level Measurement Mode Parallel Generator L1 and L2 Measurement Control T2 Generator T2 V oh S Please note ISO 16283 locks the Planned Measurement parameter to on for the L1 L2 and B2 positions CHAPTER 4 Building Acoustics Software 29 Planned Measurement set to Onif you want to perform the measurement in a planned sequence and define the number of source positions and microphone positions per source or set to Off if you want to perform the measurements manually from Pos 1 onwards No of Sources Positions set to the number of sound source positions you are using only available if the Planned Measurement parameter is set to On L1 L2 No of Micr Pos per Source set to the required number of microphone positions you are using with each source only available if the Planned Measurement parameter is set to On Increment this parameter allows you to define the order in which you want to do your measurements Source First Mic Position First or Manual Preset Time sets the averaging time in hours minutes and seconds see also Fig 2 2 Automatic Save set to Off if you want to inspect the measurement before manually saving it or set to On if you want
113. rement for pasting at another position e Paste pastes the cut measurement 22 Building Acoustics Software BZ 7228 User Manual Please note Cut and Paste are only available in Planned measurements section 4 4 1 where data already exists When viewing the 72 function tap the top line in the overview for the following options 120 1730 4 2 6 Spectrum Tab L1 L2 L1 amp L2 and B2 The Spectrum tab shows the sound pressure level spectrum for a single measurement position but you can switch between the main spectrum view and a reference spectrum The spectra options are shown in Fig 4 5 Fig 4 5 The spectrum drop down menu 4 BUILDING ACOUS ISO 16 Reference Spectrum Main Spectrum Fig 4 6 The Y axis drop down menu 160 Hz 160 Hz CHAPTER 4 23 Building Acoustics Software In the area below the spectrum two parameters can be shown both can be selected from drop down menus see Fig 4 7 Fig 4 7 S ISO Airborne The parameter j Li drop down menu 160 Hz 160 Hz dB 103 0 dB Spectrum 11 18 00 4 2 7 Spectrum Tab T2 The Spectrum tab for T2 measurements shows the reverberation time spectrum from a position i e 720 Pos or T30 Pos see Fig 4 8 the average reverberation time i e 720 or 730 or both The sound level is displayed during measurements For more information see section 4 5 4 Fig 4 8 BUILDING ACOUS ISO 16283 Airborne The Spectrum tab ms
114. rrections can beadded toboth the Top Socketand the Rear Socket Input parameters Sound Field Correction Free field Diffuse field Select a correction matching the sound field of your measurements i e you can make correct measurements in a diffuse field using a Type 4189 free field microphone by selecting Diffuse field correction Building Acoustics measurements require the D ffuse field setting No correction is made for unknown transducers Windscreen Auto Detect On Automatic detection of UA 1650 windscreen when Off mounted on the ZC 0032 microphone preamplifier The preamplifier should be connected to the top socket if necessary using a microphone extension cable This parameter is only available for microphone types using ZC 0032 Windscreen Correction None If Windscreen Auto Detect is set to Off you can manually UA 1650 select a windscreen correction suitable for the windscreen UA 1404 in use Correction is automatically made for the windscreen on Type 4952 No correction is made for unknown transducers Range Setting High Range Set Range Setting to High Rangeor Low Rangeas required Low Range The difference between the two settings is 30 dB High Range can be used to measure up to the max input level This setting is relevant for Measure L1 and L2 Simultaneously and Autorange Off or for Input set to Ch 1 and Ch 2 and Autorange Off Type 2270 only and requires a BZ 7229 license s 84
115. rum in a table see an example in Fig 4 27 e Close to exit the drop down CHAPTER 4 a7 Building Acoustics Software Fig 4 27 Spearum Taie TH Spectrum table Freq T30 T30Status gt 100 Hz 0 68 s F 125Hz 0 60sok 160 Hz 0 79 s o k 200 Hz 0 88 s 250 Hz 1 02s0 k 315 Hz 1 00 s 400 Hz 1 12sok 500 Hz 0 79s 630 Hz 0 74s 800 Hz 0 63s 1kHz 0 70s 1 25kHz 0 61s 1 6 kHz 0 62s 2kHz 0 64s 2 5kHz 0 68s 3 15kHz 0 61s 14 10 31 Auxiliary Parameters Below the graphics are two lines containing parameters for displaying the LCF and LAF broadband values 4 5 5 Decay The Decay tab shows the reverberation time decay from a position the average of positions or both see Fig 4 28 Decay Graph The Decay Graph shows the decay of one frequency band for the selected position the decay of the same frequency band for the average of positions requires Ensemble Averaging or both The Decay Parameter Selectors above the graph select which decay to display 720 Pos or 730 Pos Each of these selections show the decay for the measurement at the selected position together with the readout of 720 Pos and 730 Pos resp 720 and 730 show the decay for the current position If you only want one graph you can set the other selector to Off Fig 4 28 Decay view Building Acoustics Software BZ 7228 User Manual 160Hz gt 0 160 Hz The main decay on the display displayed as a continuous line is selected using the
116. s APPENDIX A Setup Parameters Parameter Values Comment Generator Type Internal External Set to nternal to use the internal noise generator as specified below Set to External to switch an external generator on off using a logic signal On 3 3 V Off 0 V The generator signal appears at the Output Socket Please note Set Measurement Control gt Excitation nterrupted Noise to enable the generator parameters Noise Type Pink White The type of noise from the internal generator The bandwidth of the noise will be adjusted to the frequency range from Bottom Frequency to Top Frequency Level re 1 V 80 0 to 0 0 dB This sets the internal noise generator attenuation in dB referenced to 1 V This level stays at the set level irrespective of the frequency range Escape Time Oto 605 Set the Escape Time to allow the operatorto leave the room before the generator is turned on and the measurement starts s 90 Building Acoustics Software BZ 7228 User Manual Table A 9 Cont Generator for T2 Parameters Type 4292 Optimum Type 4295 Optimum Type 4296 Optimum Type 4292 Flat Type 4295 Flat Type 4296 Flat Parameter Values Comment Build up Time lto 10s Set the Build up Time to allow the sound pressure in the room to settle after the sound source is switched on Sound Source Unknown This setting optimizes the frequency response of the
117. se refer to Fig 3 1 2 Under the Standard parameter set Standard to SO 16283 and Task to Airborne both indicated next to the template selector see example in Fig 4 16 Please note Only those parameters noted below need to be set up for a Planned Measurement task the remaining parameters should be left at their default settings Fig 4 16 Typical ISO 16283 Airborne spectrum display ah 1 25 kHz 55 2 dB 100 250 500 ik 2k 3 15k AC LCF 81 8 dB amp 16 41 07 3 Determine the sound level of the source room will be determined indicated below the Template Selector on the second line 2 4 With an empty Building Acoustics template set Setup gt Measurement Control L1 L2 and B2 parameters Planned Measurement locked to On Number of Sources Positions to 2 L1 No of Mic Pos per Source and L2 No of Mic Pos per Source to 3 CHAPTER 4 35 Building Acoustics Software 5 Check the levels by tapping on the lower parameter of the two parameter selectors shown above the graph and select the instantaneous level LZF Fig 4 16 You can check the level of the sound source by switching it on and off using the loudspeaker icon i Hint LAF and LAC broadband readouts are shown to the right in the spectrum Ready for First Measurement Please note When measuring according to ISO 16283 1 each source position must be measured for L1 and L2 before moving to the next source position in a default mea
118. sl e 1 Pos2 e 1 Pos3 e 2 Posi e 2 Pos2 e 2 Pos3 The indicates unsaved data in this example for 2 Pos1 11 When the L1 measurements have been done change the function to L2 B2 or T2 and continue measuring in the same way as described above until all functions have been measured Please note The B2 function has no Planned source microphone position sequence you just measure it in a number of positions Automatic Increment The Increment parameter under Measurement Control L1 L2 and B2 parameters defines the order in which you want to do your planned measurement sources first Source First or microphone positions first Mic Pos First You can also decide to choose each subsequent position manually see Manual Selection of Measurement Position that follows Automatic Save Set the Automatic Save parameter to Onto automatically save the measurement and increment the position counter to be ready for measuring at the next position Manual Selection of Measurement Position If you select another measurement position the Save amp pushbutton will save at this position and select the next position as defined by the Increment parameter under Measurement Control L1 L2 and B2 parameters This might be a position where some data have already been saved An extra pop up warning will appear if you try to save the data in a position already containing data If the Increment parameter is set to Manual
119. surement 6 The third line of the status field shows 1 Pos1 this is the position selector and it indicates the current source and microphone position The current source and microphone position are also displayed in a list on the Overview tab see Fig 4 17 7 Select L1 Pos instead of LZF in the lower parameter and 51 L1 in the upper parameter This will allow you to monitor the average level of L1 and the level of the current position throughout the measurement see Fig 4 17 8 Press the Start Pause 4 pushbutton to perform the first measurement 1 Pos1 will be displayed in the status field The indicates that the measurement has not been saved After 10 seconds the measurement data are shown in the black line below the position selector Fig 4 17 left Please note Ifasmiley appears during the measurement it will appear in the black line below the Status Field Position Selector Two smileys are shown in Fig 4 17 one is applicable to the 100 Hz band in the black line and the other smiley above it is for the complete position S1 Pos1 Small smileys are set below each frequency band with a potential problem The smileys are also available at the cursor readouts Tap on the smiley at the cursor readout for detailed information For a description of status indicators and smileys see Quality Indicators on page 60 The Spectrum is shown in Fig 4 17 right Fig 4 17 Overview and Spectrum tabs after the first measurem
120. t the Increment parameter depending on the order in which you want to do your measurements either Source First Mic Positions First or manually Manua Only available if Planned Measurement is set to On 6 Set Automatic Save to Offif you want to inspect the reverberation time and decays before manually saving the measurement otherwise select On to automatically save the decays after each measurement 7 The analyzer automatically detects the end of the decay however under special conditions for example when measuring with high background noise the end of the decay cannot be detected and the measurement will run up to 20 s To minimise the measurement time and memory requirement for the measurement you can limit the measurement by setting the Max Decay Time Five seconds is adequate for most ordinary rooms but should be increased for larger halls or reverberation rooms 8 If you are using a loudspeaker source set Excitation to nterrupted Noise and go to step 9 Otherwise if you want to measure using the impulse method i e using a balloon burst or a starting pistol set Excitation to mpu sive and go to step 11 For a description of these two methods please referto the Hand held Analyzer Types 2250 and 2270 User Manual 14 Interrupted Noise Method 9 Set the number of decays you want to measure per position The analyzer automatically controls the generator measurement of the decays and averaging the decays Only a
121. t the need for controlling Type 2250 2270 between the measurements Observe how the Traffic Light indicates the status of the measurement making it easy for you to change position and generate the impulse synchronised with the measurement procedure Press the Start Pause pushbutton to stop the measurement when the last measurement has been saved Generator Setup for T2 The parameters for setting up the generator for Reverberation Time measurements T2 are identical to those for the generator setup of L1 and L2 see Fig 4 13 and Generator Setup for L1 and L2 on page 29 Signal Recording The parameters for setting up Signal recording are identical to those described in Setup for Signal Recording on page 30 Controlling the Measurement Measurement is controlled in the same way you would control a level measurement using Start Pause 4 Continue Back erase and Reset pushbuttons see Hand held Analyzer Types 2250 and 2270 User Manual Chapter 3 for more details Planned Measurements e Press the Start Pause pushbutton when the first measurement position SZ PosJ is highlighted in the Overview table When the measurement is finished SZ PosZ will be displayed e Press the Save amp pushbutton to save the measurement at the S7Posl position SI Pos2 will be selected automatically Press the Start Pause pushbutton to measure in sequence at Pos2 Pos3 etc Unplanned Measurements e Press the St
122. teeeees 29 42 43 Autorange Type 2270 Only c ccccceeseeeeeeeees 53 Build up Time Generator Type ceeeseeceesesseceeesneeeaeeeeeseeeaeeeees 29 Increment Input for B2 Type 2270 Only nesese 53 Input for L1 Type 2270 Only 53 Input for L2 Type 2270 Only 53 Input for T2 Type 2270 Only 53 L1 Check 6 dB Rule L1 L2 Check Std Deviation cccccccceeeeeeeees 32 L1 L2 No of Micr Pos per Source sses 29 Level Measurement Mode 29 Max Decay Time 42 Measure L1 and L2 Type 2270 Only 53 No of Micr Pos per Source 42 No of Sources Positions 29 No of Sources Positions eeeeeceeeeeeeeeeeeeees 42 Noise TYPO ee eee eee eee eceeeeeeeeeeeeseseeseaeeeneeeeeees 30 OILR Correction asan oe ee ee ees 32 INDEX 101 OME Coreto nens aA An 32 Partition Area Seienn RL he eee 33 Planned Measurement c ccccceeceeesneee 29 41 Preset Time Range Setting Type 2270 Only 54 Receiv Room Floor Area ccccccccccccsssseeeeeeesees 32 Receiv ROOM Volume V ccccccccccecssstseeeeeeeeeees 31 Recording Quality 30 Reolution Rubber Hammet cccccccccsssseeeeeeessssteeeeeeeeeees 32 Sound RECOMING ececeeeeeceeeeeeteeteeeeeeeeeeeeaees 30 Sound Source Stone Traffic Type amp hiv snucteacceeusedecsroartiu odiseeseteaneneneenceses Trigger Level Trigger Repeat Partition Area ceecc
123. teness and are not intended to form the basis of any contract The information in this document does not constitute a warranty representation or guarantee concerning the suitability or performance of the product Briel amp Kj r shall not be liable for any loss whether direct indirect incidental or consequential arising from the use of or reliance upon any of the content of this document regardless of whether such content has been accurate or complete Briel amp Kjaer will not pay any damages whether for loss or injury punitive or otherwise because of use of or reliance upon any of the content in this document Briel amp Kj r and all other trademarks service marks trade names logos and product names are the property of Bruel amp Kj r or a third party company Nothing in this document may be construed as granting by implication or otherwise any license or right to use any of the trademarks withouta priorwritten permission of Briel amp Kj r or the owner of such trademark Briel amp Kj r All rights reserved Briel amp Kjaer Sound amp Vibration Measurement A S DK 2850 N rum Denmark For service and support contact your nearest Bruel amp Kj r Customer Care support team Headquarters info bksv com 45 7741 2400 China Beijing 86 10 59935811 France service fr bksv com 33 1 69 90 71 02 Germany bkservice de bksv com 49 421 17 870 Italy it info bksv com 39 02 5768061 Japan info_jp bks
124. the decay cannot be determined because it does not end in the background noise y 5 Background noise too high Background noise is above the upper evaluation point consider making serial measurements at the frequency bands with high background noise see section 4 4 8 t No decay start found No decay start found Y 5 Background noise too high Background noise is above the lower evaluation point consider making serial measurements at the frequency bands with high background noise see section 4 4 8 T g Maximum decay time too short The lower evaluation point is beyond the decay time Z E No decay found The slope of the decay is positive i e the reverberation time is negative P 5 Reverberation time too short Less than two points in evaluation range O 5 Excitation sound level too high Overload or wrong L1 and L2 level range F Short reverberation time BxT below 16 B filter bandwidth and T reverberation time of detector R amp T20 used T30 unavailable T20 used T30 unavailable n High background noise Background noise too close to level at lower evaluation point consider making serial measurements at the frequency bands with high background noise see section 4 4 8 p amp Short reverberation time Less than four points in evaluation range Building Acoustics Software BZ 7228 User Manual Table 4 4 Continued Overview of Status Indicators and Smileys Status r er
125. to 110 dB Frequency Analysis CENTRE FREQUENCIES 1 1 octave Band Centre Frequencies 63 Hz to 8 kHz 1 8 octave Band Centre Frequencies 50 Hz to 10 kHz MEASURING RANGES When using Microphone Type 4189 Dynamic Range From typical noise floor to max level for a pure tone signal at 1 kHz 18 octave Single Range 1 1 to 140 dB High Range 11 3 to 140 dB Building Acoustics Software BZ 7228 User Manual Low Range 1 1 to 110 dB Linear Operating Range In accordance with IEC 61260 Single Range lt 20 5 to 140 dB High Range lt 39 1 to 140 dB Low Range lt 20 5 to 110 dB Internal Generator Built in pseudo random noise generator Spectrum Selectable Pink or White Crest Factor Pink Noise 4 4 13 dB White Noise 3 6 11 dB Bandwidth Follows measurement frequency range Lower Limit 50 Hz 1 3 oct or 63 Hz oct Upper Limit 10 kHz 1 8 oct or 8 kHz oct Output Level Independent of bandwidth Max 1 Vim 0 dB Gain Adjustment 80 to 0 dB When bandwidth is changed the level for all bands is automatically adjusted to comply with the set output level Correction Filters For sound sources Type 4292 L Type 4295 and Type 4296 Flat or Optimum Turn on Time and Turn off Time Equivalent to RT 70 ms Repetition Period 175 s Output Connector Output Socket Control See Measurement Control External Generator Selectable as alternative to Internal Generator For controlling external noise generator Levels
126. um Parameters eseeteeees 87 Low Frequency Measurements 41 E tee tent teeeeeeeneeteteateateaeeneeteateateateaneane 7 LZPren a aea e a a iaaa 46 M Manual Selection of Measurement Position 37 39 Markei Sanninina a aed 87 Measure L1 and L2 Simultaneously Type 2270 Only 0 cceecceesceeececeeeeeeeeeeeeeeeeeeeaeeeees 54 Measured Standards Measurement Control L1 L2 and B2 Parameters 85 Measurement Control Setup L1 L2 and B2 28 Measurement Control T2 Parameters Measurement Parameters 06 Measurement Procedure c ccccccccsssseteeeeeeeeeseees Measurements Lab Orato ryiccsics iieiaei aiiai Receiving Room B2 Receiving Room L2 Reverberation Time T2 ccceeesseeeseeseteeeeees 8 Source ROOM L1 inasi 7 Measuring Two Positions Simultaneously eeeeeeeeeeeeee 58 Measuring Two Positions Simultaneously 58 N Navigating Building Acoustics Software 17 NOW PrOj Ct scccescesciececcencosseovcserseeetencesecntetecsccvecineeses 64 O Ove Wen inn r e rardan dipana aana aa a 58 Overview L1 L2 L1 amp L2 B2 and T2 21 Overview of Building Acoustics Standards 95 Ovemiew TaD atse a Adi see 44 58 Overview Tab Type 2270 nosece 55 Overview Tab in Reverberation Time Software 44 P Paperclip n msnnen a Nii 20 Parallel kaea raa a ee eats 29 Parameters Automatic Save ccccccsceceeseeee
127. v com 81 3 6810 3500 North amp South America bkservice bksv com 1 770 209 6907 Spain servicio tecnico bksv com 34 91 659 08 20 UK amp Ireland ukservice bksv com 44 1223 389800 Go to www bksv com contact for contact information to our other global offices Contents CHAPTER 1 IATFOAUCTION Sicdseiecidcccdistescssveccccecesess teusvecdcadtvossceSenaccccsbensseesdasesececdsssestsaas esescseresscasassaveseseensteses 1 1 1 Howto Use this Manu all eases secs la lucsepeccecoshh ges a ean dae coe tana a Gu a ie aaa i a 1 CHAPTER 2 Building Acoustics Me aSUureMents ssscccccccsssssssssssccceecccccnssssssssesesccecaaasassssseescccecasaesssssseees 3 2 1 Building Ato stics Defined 25 5 T a Ss ccs dine QeR ae dan See toes or A iaa barise teini aeia 3 2 2 Measurement Proced ra aa a a aaia eaa aa iiaa aai 6 CHAPTER 3 SYSTEM OVERVIEW a r aeaa aaaea aaa aa aa AEE E bedeoossaheevasvedeoecedcssicecvodedeteleteccovesesccans 15 CHAPTER 4 Building Acoustics SoftWare ssssisssssrirrissresvevisssserireiiadinssssorss vinen ttds issin ss ss vivun keiensis oesters stas 17 4 1 What is a Building Acoustics Project ssesssssessseresssssserrerssssrerrrssssrerrerressrereesessrerreesesseerree 17 4 2 Navigating Building Acoustics Software s essesssssesssrrerssesrerressesreererssssrereesesseerreeressesrreneese 17 4 3 Things To REMEMDER nise eona r A PEE EA E AE NEE 24 4 4 Level Measurements L1 L2 and B2 c
128. vailable if the Excitation parameter is set to nterrupted Noise 10 Set Generator as required These parameters are the same as those described in the Level Measurements section See Generator Setup for L1 and L2 on page 29 Go to step 13 11 T2 Measurement Mode set to Parallel for measuring all bands in a spectrum simultaneously set to Seria for measuring selected bands only to be saved and merged with a previously measured Parallel spectrum or set to Combined for measuring Parallel and then Serial in an automated sequence When doing the Serial measurement the bandwidth of the generator will match the selected band thus increasing the output level of the band and increasing the signal to noise ratio for the band Serial measurements for T2 are made in a similar way to L1 and L2 measurements see the example in section 4 4 8 CHAPTER 4 43 Building Acoustics Software Impulsive Method 12 Set Trigger Level low enough to be sure the impulse will be triggered but high enough to avoid triggering on the background noise between 80 and 100 dB is normally adequate Only available if the Excitation parameter is set to Jmpulsive 13 If you have selected Automatic Save yes then Trigger Repeat can be set to yes to automatically start anew measurement when a measurement has been saved Only available if the Excitation parameter is set to mpu sive This allows you to go to another position and make a new impulse withou
129. vely with L2 at the same measurement positions Typical B2 Measurement Cycle The different stages of a typical B2 measurement cycle are described below 1 Set the Escape Time tap Main Menu Eq gt Setup gt Generator L1 and L2 gt Escape Time and enter the time which allows you to vacate the measurement room and press Start Pause on the analyzer 2 The measured spectra are averaged by the analyzer in the chosen averaging time Avg Time Reverberation Time T2 Measurements Reverberation time T2 is the decay time for sound in a room after the excitation stops It is the time for a 60 dB drop in level but the decay is usually evaluated over a 20 or 30 dB drop using the measurements within these ranges to make a regression line which is then extrapolated to the 60 dB range see Fig 2 3 CHAPTER 2 9 Building Acoustics Measurements Fig 2 3 Definition of Reverberation Time T2 dB Regression Line AA 0dB WV N Excitation Level 5dB Evaluation Range Background Noise Level Reverberation Time 060210 Reverberation time used in building acoustics is labelled either T20 or T30 depending on which of the two evaluation ranges were used All measurements are made in the receiving room As with L1 L2 and B2 measurements a series of measurements are made at different positions in the room to allow for spatial variations of reverberation decay A reverberation time measurement is made usin
130. y To give maximum flexibility position average and calculated data can be overridden by manually inputting data in the data sheets CALCULATIONS Supports calculation of insulation and reverberation tasks Insulation calculations include airborne and impact sound insulation lab field In addition airborne facade calculation is supported REPORT GENERATION Based on document templates it is possible to make reports conforming to the supported standards OUTPUT Relevant views and sheets can be printed or exported to the clipboard Text or graphs may be transferred to word processors in RTF Rich Text Format HELP Online context sensitive and user guide DATA TRANSFER e Via USB using Measurement Partner Suite BZ 5503 MINIMUM PC e Windows 7 8 or 8 1 all in 32 bit or 64 bit versions e Intel Core i3 e 2 GB RAM e Sound card e DVD drive e Mouse Ordering Information BUILDING ACOUSTICS KITS The following kits are designed to provide Type 2250 and Type 2270 users with the necessary accessories to perform single channel building acoustics measurements BZ 7228 200 Building Acoustics Kit for single channel airborne sound insulation including e BZ 7228 Building Acoustics Software includes Reverberation Time Software BZ 7227 e Type 2734 A Power Amplifier e Type 4292 L OmniPower Sound Source tripod and carrying bag KE 0462 included e AO 0523 D 100 Signal Cable Triaxial LEMO to XLR3M 10 m 33 ft

User Manual: Building Acoustics Software BZ-7228

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