Set Up Guide & User Manual
Contents
1. Set Guide amp User Manual Hearing Helper PERSONAL FM System Models PFM 300 amp PFM 350 Wireless FM Listening System Receiver Models R31 R32 MAN 072C Transmitter Model T30 Williams Sound elping People Hear F A HEARING HELPER PERSONAL FM System Mopers PFM 300 PFM 350 INSTALLATION GUIDE amp USER MANUAL Contents Page SYSTEM OVERVIEW 4 SYSTEM COMPONENTS 5 USING THE T30 TRANSMITTER 6 USING THE PFM R32 RECEIVER 7 USING THE PFM R31 RECEIVER 8 BATTERY INFORMATION 10 UsinG YOUR PERSONAL FM System WITH A HEARING AID 12 APPLICATIONS FOR VARIOUS HEARING Loss LEVELS 13 IN Case OF DIFFICULTY 14 CHANGING FREQUENCIES 15 WARRANTY 17 SYSTEM SPECIFICATIONS 18 Acoustic SPECIFICATIONS 19 7 Williams Sound 3 Helping People Hear F A SYSTEM OVERVIEW Thank you for purchasing the Hearing Helper Personal FM System from Williams Sound Corp Anyone needing auditory assistance to overcome background noise reverberation or distance from the sound source can benefit from the Personal FM System Your PFM System has two principal parts the Transmitter and the Receiver Much like a miniature radio station the Transmitter and microphone pick up the sounds you want to hear and broadcast them over an FM radio signal The receiver and earphone are used to pick up the broadcast up to 100 feet away To avoid difficulties please read through these instructions as you begin to use the system Then2. 3 5 8 L x 2 3 8 W x 7 8 H 92 1 mm x 60 3 mm x 22 2 mm 4 6 oz 130 g with batteries Royal blue shatter resistant polypropylene Two 2 AA 1 5 V non rechargeable Alkaline batteries BAT 001 14 mA nom current drain 80 hours approx life OR Two 2 AA 1 5 V NiMH rechargeable batteries BAT 026 14 mA nominal current drain 50 hours per charge approx recharges in 14 16 hours uses CHG 200 Charger CNM R31 Pre Tuned Field tuneable 72 MHz 76 MHz Pre set channels are E 72 9 MHz and G 75 7 MHz Wide band 75 kHz 75 uS de emphasis 120 kHz 4 uV at 12 GB Sinad with squelch defeated squelches at 10 UV for min 50 dB S N ratio 100 to 10 kHz 3 cB 50 dB at 10 uV Integral with earphone cord 35 mW max at 16 Q 3 5 mm mono phone jack Set to turn off audio under weak or no signal condition Red LED turns on in the presence of a carrier Volume rotary on off volume Tone 3 way slide switch Lo flat response 20 Hz Mid 3 dB at 235 Hz Hi 3 dB at 730 Hz Channel 2 vvoy slide switch Ch 1 72 9 MHz Ch 2 75 7 MHz Indicators On off and FM Specifications are electrical performance PFM R31 Receiver Only Mic Connecter Microphone Mic Volume 3 5 mm mono phone jack supplies positive DC for Williams Sound electret mics Plug mount electret omnidirectional with windscreen 3 5mm mono phone plug MIC 014 Rotary control 7 Williams Sound Helping People Hear F A ACOUSTIC SPECIFICATIONS ANSI 2 44
3. SSPL90 133 5 dB at 1000 Hz HF Avg SSPL90 127 0 dB HF Avg Full On Gain 35 4 dB at 60 dBin Reference Test Gain 35 8 dB Response Limit 78 01 dB F1 200 Hz F2 8 kHz Total Harmonic Dist 1 1 at 500 Hz 2 7 at 800 Hz 2 1 76 of 1600 Hz Environmental Mic Response PFM R31 Only No TONE MODiFICATION Max SSPL90 134 8 dB at 500 Hz HF Avg SSPL90 126 4 dB HF Avg Full On Gain 40 9 dB at 60 qB in Reference Test Gain 40 8 dB Response Limit 81 1 dB F1 200 Hz F2 8 kHz Total Harmonic Dist 1 1 at 500 Hz 1 1 at 800 Hz 0 3 at 1600 Hz 19 P M VW Williams Sound Corp 10321 West 70th St Eden Prairie MN 55344 U S A 800 328 6190 952 943 2252 FAX 952 943 2174 www williamssound com 2003 Williams Sound Corp MAN 072C
4. frequencies Mid some low frequency cut Hi maximum low frequency cut emphasizes higher frequencies See Figure 6 8 Place the Receiver in the belt clip case provided The Receiver can be placed in a pants pocket or clipped onto a belt harness or waistband Helping People Hear F A Notes The earphone cord is the receiving antenna Do not bunch up the cord or wrap it around the receiver For best reception the cord should hang as straight as possible Make sure the Receiver is turned OFF when not in use The channel selector can be used to switch between an individual and a group channel Adjusting The R31 Volume Controls 1 Adjust the taller FM volume control to a comfortable listening level You should be able to hear someone speaking into the Transmitter microphone 2 Now adjust the shorter Mic volume control until you can hear sounds picked up by the environmental microphone on top of the receiver 3 Adjust the two volume controls for a comfortable mix of FM and environmental sounds You will normally want to have the FM signal louder than the environmental Mic signal to avoid picking up extra background noise If no environmental sounds are desired turn the Mic control fully to Min If you want to hear nearby conversation or your own voice turn the Mic control up Williams Sound 9 Helping People Hear F A BATTERY NFORMATION NSTALLATION Open the battery
5. save them for questions that arise as you continue to use your Williams Sound Personal FM System If you have problems with the PFM system don t hesitate to call us toll free at 1 800 843 3544 FIGURE 1 How THE PFM System WORKS FM Radio Signal Speaker Uses Transmitter Listeners use R31 or R32 Receivers with With Microphone Earphones Headphones Or Neckloop The speaker wears the body pack transmitter and a clip on microphone The speaker s voice is broadcast as an FM radio signal over a distance of 100 150 feet 30 45 m Listeners use the pocket receiver and earphone or headphone to hear the speaker s voice directly with reduced background noise A neckloop telecoil coupler allows the system to be used with telecoil T Switch equipped hearing aids Helping People Hear P M SYSTEM COMPONENTS V V Y Y VY Body Pack Transmitter PFM T30 with 2 AA batteries BAT 001 Lavalier microphone MIC 090 Mini earphone EAR 013 Soft Nylon System Carry Case CCS 020 2 Belt clip cases CCS 021 Instructions MAN 072 PFM System 300 Only Personal FM Receiver PFM R32 with 2 AA batteries BAT 001 PFM System 350 Only Personal FM Receiver PFM R31 with Plug Mount Microphone MIC 014 and 2 AA batteries BAT 001 FIGURE 2 SYSTEM COMPONENTS Microphone Earphone Earphone Microphone On Off amp Mic On Off amp On Off Switch FM Volume Volume FM Volume 7 Jack El vitiams Sound Cl
6. witiams Sound YF vitiams Sound p Hearing Helper Hearing Helper Hearing Helper T30 Transmitter R32 Receiver R31 Receiver PFM 300 amp 350 Systems PFM 300 System PFM 350 System Williams Sound 5 Helping People Hear F A UsING THE T30 TRANSMITER 1 Make sure there are two charged AA batteries in the transmitter If batteries are not installed see Battery Information on page 10 2 Plug the microphone cord into the Mic jack on top of the Transmitter Fic 3 T30 TRANSMITTER TOP VIEW 3 Place the Transmitter in the belt clip case provided 4 Turn the power switch on top of the Transmitter to On 5 Clip the microphone onto a collar lapel or tie It should be as close to the speaker s mouth as is practical See Figure 4 The transmitter can be placed in a pants pocket or clipped onto a belt or waistband Make sure the Transmitter is turned OFF when not in use FIGURE 4 CORRECT MICROPHONE PLACEMENT 224 The System 300 350 comes with an omnidirectional lapel clip style microphone It should be clipped to a collar lapel tie or neckline as close to the mouth as possible and centered on the body as shown Note On The Transmitter Antenna The microphone cord is the transmitting antenna Do not bunch up the cord or wrap it around the transmitter For maximum range the cord should hang as straight as possible Helping People Hear F A UsING THE P
7. FM R32 Receiver PFM 300 K Receiver model PFM R32 has a single volume control and an earphone output jack 1 Make sure there are two charged AA batteries in the Receiver If batteries are not installed see Battery Information on page 10 2 Plug the earphone or headphone into the Ear jack on top of the Receiver FIGURE 5 R32 RECEIVER ToP VIEW On Earphone Indicator Jack FM Indicator qoluma Control 3 Turn the power on by rotating the volume control knob on top of the Receiver 4 Place the earphone in your ear 5 Choose the correct channel using the right switch on the R32 s back panel Unless you have changed the Transmitter channel set the receiver to channel 1 If the Transmitter is on and tuned to channel 1 the FM Indicator light on the R32 will light FIGURE 6 RECEIVER TONE amp CHANNEL CONTROLS TONE Channel m m Lo Mid Hi CH1 CH2 6 Adjust the receiver volume control to a comfortable listening level You should be able to hear someone speaking into the Transmitter microphone 7 Adjust the receiver tone control to your needs Lo more low frequencies Mid some low frequency cut Hi maximum low frequency cut emphasizes higher frequencies See Figure 6 8 Place the Receiver in the belt clip case provided The Receiver can be placed in a pants pocket or clipped onto a belt harness or waistband Notes The earphone cord is the r
8. ITTER MopeL PFM T30 Dimensions Weight Color Battery Type Operating Freg s Stability Modulation RF Output FCC ID Freq Response Signal Noise Ratio Auto Gain Control Transmit Antenna Microphone Controls Mic Connector 3 5 8 L x 2 3 8 W x 7 8 H 92 1 mm x 60 3 mm x 22 2 mm 4 4 oz 125 g with battery Royal blue shatter resistant polypropylene Two 2 AA 1 5 V Non rechargeable Alkaline batteries BAT 001 70 MA nominal current drain 12 hours approx life OR Two 2 AA 1 5 V NIMH Rechargeable batteries BAT 026 70 mA nominal current drain 10 hours per charge approx recharges in 14 16 hours uses CHG 200 Charger Selectable 10 channels 72 1 75 9 MHz internal DIP switch 005 frequency synthesized crystal reference PLL Wide band FM 75 kHz 75 HS pre emphasis 8000 uV m at 30 m max 40 mW typical CNM T30 100 to 10 kHz 3 dB at 1 max THD 55 60 with R31 or R32 Receiver 40 dB range 30 mV threshold Integral with 40 microphone cord Omnidirectional condenser Lavalier type 40 cord 3 5 mm mono phone plug MIC 090 On Off switch slide type 3 5 mm mono phone jack RECEIVER Mopess PFM R31 amp PFM R32 Dimensions and Weight Color Battery Type FCC ID Operating Freg s FM Deviation AFC Range Sensitivity Freq Response Signal Noise Ratio Receive Antenna Audio Output Output Connector Squelch Carrier Detect Ind Controls Note
9. KE ZC X IN U VU U U vv U v T30 Transmitter z lt lt 2 XX 5 D U D U D U D U U D N p p p p p 00 00 00 eoudodo s u uv 529959599595999 4 Use the tip of a paper clip or a small screwdriver not a pencil point to move the switches to correspond with the switch positions on the programming chart in Figure 11 Remember your first choice should be G 75 7 MHz If you must use another channel select a frequency at least two channels away from the one on which you are experiencing interference Do not touch any other adjustments 5 Reinstall the batteries then close the back of the Transmitter 6 Plug the microphone in and turn the Transmitter on to provide a tuning signal for the receivers 7 Change the receivers to channel 2 If you set the transmitter to any channel other than E or G you will need to re tune the receivers See the next section for receiver tuning instructions Note Many PFM users reserve Channel 1 on their receivers to match large area FM systems set to Channel E 72 9 MHz They set their T30 Transmitter to Channel G 75 7 MHz to allow receiver users to switch between channels depending on the listening situation 7 Williams Sound Helping People Hear 15 F A TUNING THE PFM R31 amp R32 RECEIVERS Tuning for th
10. Test 30 20 15 F z 5 Ji 0 z l i 20 gt A e ii p m n x r xal aa 2 7 425 250 500 ik k dk 8k 16k input 6025 TIO AIL AF AVM 20 FM Response PFM R31 R32 Input 80 dB random noise Device KEMAR mannequin with BTK 3550 Tester Y 80 0 dB 80 db Main Y 34 1 dB X 100 Hz 8 OCTLOG Main X 4 kHz ao 1 i 4 v 4 1 70 r T uu ara 125 250 500 ik 2k 4k Ek 16k uz 8008 Fendon NOISE TIOL MC Hip SAVM 20 Environmental Mic Response PFM R31 Only Input 80 dB random noise Device KEMAR mannequin with BTK 3550 Tester Y 80 0 dB 80 db Main Y 50 2 dB x 100 Hz 8 OCT LOG Main X 4kHz iy 7 Williams Sound ANSI 3 22 1987 Test FM Response PFM R31 R32 Minimum Low Cut TONE SET To Low Max SSPL90 135 8 dB at 500 Hz HF Avg SSPL90 127 1 dB HF Avg Full On Gain 37 7 dB at 60 dBin Reference Test Gdin 38 1 dB Response Limit 80 1 dB F1 200 Hz F2 8 kHz Total Harmonic Dist 3 6 at 500 Hz 3 9 at 800 Hz 2 2 at 1600 Hz MepuuM Low Cur TONE SET To Max SSPL90 135 5 dB at 600 Hz HF Avg SSPL90 127 1 dB HF Avg Full On Gain 36 8 dB at 60 cB in Reference Test Gain 37 3 dB Response Limit 79 4 dB F1 200 Hz F2 8 kHz Total Harmonic Dist 3 4 at 500 Hz 3 4 at 800 Hz 2 2 at 1600 Hz Maximum Low Cur Tone Ser To HI Max
11. ach other MORE THAN ONE TRANSMITTER ON THE SAME CHANNEL WILL RESULT IN INTERFERENCE IF THEY ARE CLOSE TOGETHER Keep the systems 50 100 feet apart or use separate channels for each system used If you are still hearing interference on the Receivers turn the Transmitter off and listen with a receiver If you hear the interference with the Transmitter off you need to change to a clear channel See the re tuning instructions If problems remain contact your dealer for further help Or call Williams Sound toll free at 1 800 843 3544 7 Williams Sound Helping People Hear F A CHANGING FREQUENCIES If you experience FM signal interference you can easily adjust your transmitter and receivers to a use different frequencies Your first channel choice should be Channel G 75 7 MHz This matches channel 2 on the R31 and R32 Receivers CHANGING THE PFM T30 TRANSMITER FREQUENCY 1 Open the battery compartment using a coin in the slot in the bottom of the transmitter Remove the batteries 2 Lift the flap up and to your left The back of the Transmitter case will open like a book exposing the circuit board 3 Use the diagram in Figure 11 to locate the channel selector switches FiGuRE 11 TRANSMITTER FREQUENCY CHANGE INFORMATION Switches set for 72 9 MHz UP OFF DOWN ON Switch Settings 3 4 DN DN DN DN DN DN DN DN DN DN Batteries Xx
12. atteries Remove the receivers when charging is completed gng Power Input FURTHER SUGGESTIONS Receivers and Transmitters SHOULD NOT be left charging continuously when not in use Receivers should always be turned OFF while charging It s best to allow the batteries to fully discharge before charging If the batteries are near end of life and the LED turns off while the receiver is operating this is an indication to change or recharge your batteries Approximately one hour of battery life remains Repeatedly charging the batteries after short periods of use 1 2 hours will shorten battery life Rechargeable batteries will need to be replaced after 1 2 years of use II WARNING DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES The batteries may heat up and burst causing possible injury and damage to the equipment Avoid shorting the plus and minus battery terminals together with metal objects Battery damage and burns can result Use only Williams Sound supplied chargers and batteries Williams Sound 11 Helping People Hear F A USING YOUR PERSONAL FM SYSTEM WITH A HEARING AID If you have a hearing aid equipped with a Telecoil T Switch you can use a Neckloop NKL 003 children s size or NKL 001 adult s size or Silhouette coil INC 005 WC to magnetically couple the signal from the PFM Receiver into your hearing aid The Neckloop plugs into the earphone jack of the receiver Turn the switch
13. compartment using a coin in the slot in the bottom of the receiver Press the batteries into place observing proper battery polarity Incorrect insertion of the battery is difficult and may cause both mechanical and electrical damage to transmitters or receivers not covered by the 5 year warranty Units will not work with the battery incorrectly installed FIGURE 9 NSTALLATION OF BATTERIES Rear of Transmitter or Receiver Battery Compartment Note Proper Polarity DISPOSABLE BATTERIES In normal use two AA 1 5 V alkaline batteries will last about 12 hours in the T30 Transmitter and approximately 80 hours in the R31 and R32 Receivers respectively If the sound becomes weak or distorted replace the battery The indicator light may still be on even with a battery that is weak Do not leave dead batteries in the receivers Battery corrosion is not covered by the Williams Sound five year warranty RECHARGEABLE BATTERIES The PFM 300 and PFM 350 Systems can use rechargeable AA batteries BAT 026 On an overnight charge these NiMH batteries are designed to operate a T30 Transmitter for approximately 10 hours and R31 and R32 Receivers for 50 and 60 hours respectively The battery installed in the receiver may be recharged in the receiver only if it is a Nickel Cadmium battery and only if the Williams Sound CHG 200A charger is used Damage from improper charging is not covered by the Williams Sound five year warranty For cha
14. e R31 and R32 Receivers is determined by tuning coils and is stabilized by phase locked loop circuitry A plastic tuning wrench PLT 005 is needed to adjust the receiver tuning coil 1 Use the Transmitter as a tuning signal source Have someone speak into the microphone so you have something to listen to 2 Keep the Transmitter and Receiver about 15 20 feet apart while tuning The receiver must be tuned under weak signal conditions 3 Open the battery compartment using a coin in the slot in the bottom of the transmitter Pull up the receiver battery flap to open the receiver back like a book This will expose the circuit board 4 Move the channel selector switch to channel 2 right position 5 Use Figure 12 below to locate the tuning coils Use the earphone supplied with the receiver to listen for the transmitter signal while you slowly and gently rotate the tuning slugs inside the tuning coil with the tuning wrench Adjust the tuning coil for channel 2 slowly and carefully Do not press down on the tuning slug Adjust for maximum signal 5 Re tune all the receivers and mark the new frequency inside the case for future reference FIGURE 12 LOCATION OF RECEIVER TUNING COILS Channel 1 Tuning Coil Channel 2 Tuning Coil Batteries Channel Selector Switch R31 R32 Receiver 7 Williams Sound Helping People Hear F A WARRANTY The Williams Sound T30 Transmitte
15. eceiving antenna Do not bunch up the cord or wrap it around the receiver For best reception the cord should hang as straight as possible Make sure the Receiver is turned OFF when not in use The channel selector can be used to switch between an individual and a group channel Williams Sound 7 Helping People Hear F A Us NG THE PFM R31 Receiver PFM 350 Receiver model PFM R31 has two volume control knobs one for the FM signal one for environmental sounds a microphone input jack and an earphone output jack 1 Make sure there are two charged AA batteries in the Receiver If batteries are not installed see Battery Information on page 10 2 Insert the small Plug Mount Microphone MIC 014 into the Mic jack on top of the R31 Receiver FIGURE 7 R31 Top View FM Volume On Indicator Mic Jack 2 Volume FM we Mic Indicator 3 Plug the earphone or headphone into the Ear jack on top of the Receiver 4 Turn the power on by rotating the taller FM volume control on top of the Receiver 5 Place the earphone in your ear FIGURE 8 RECEIVER TONE amp CHANNEL CONTROLS Channel Ill Lo Mici Hi CH1 CH2 6 Choose the correct channel using the right switch on the R31 s back panel If the Transmitter is on and tuned to channel 1 the FM Indicator light on the R31 will light 7 Adjust the receiver tone control to your needs Lo more low
16. ectly If the rechargeable batteries will only work for a short period of time less than 1 hour even after they are fully charged they must be regenerated Leave them in the receiver or transmitter with the unit turned on for 5 6 hours Then turn receiver or transmitter off place it in the charger and charge for 14 16 hours This should restore normal battery life Rechargeable batteries will gradually lose their capacity over time and should be replaced every year Make sure the microphone is plugged into the T30 Transmitter and the earphone is plugged into the Receiver If you have the PFM System 350 make sure the R31 Receiver s plug mount microphone IS NOT plugged into the Transmitter If you re using the PFM System 350 with the PFM R31 Receiver make sure that the earphone has been plugged into the earphone jack and not into the R31 Receiver s microphone jack Move the Transmitter and Receiver closer together You may be out of range When using the system indoors it s normal for the signal to momentarily disappear in certain locations This is called a drop out Moving a few feet will restore the signal Make sure that the Transmitter and Receivers are tuned to the same channel The units have stickers inside the back cover identifying the channel Unless the Transmitter channel has been changed set the Receiver to channel 1 Do not try to use more than one Transmitter on the same channel in close proximity to e
17. g said The optional Rugged Headphone HED 022 children s size and HED 021 adult s size are recommended for this application The EAR 013 Single Mini Earphone EAR 008 Surround Earphone or EAR 014 Dual Mini Earphone can also be used M LD MODERATE HEARING Loss These applications include the classroom TV listening car riding and one on one conversations The PFM System can be used with the Single or Dual Mini Earphone EAR 013 or EAR 014 for moderate amplification fittings The Button Receiver Earphone EAR 012 WC is also available for use with a snap on custom earmold The PFM System is also suitable for temporary mild hearing loss due to Otitis Media The Rugged Headphones HED 021 or Surround Earphone EAR 022 or EAR 008 are recommended since they do not enter the ear canal SEVERE PROFOUND HEARING Loss These applications include the classroom TV listening car riding and one on one conversations For severe to profound hearing loss the PERSONAL FM System should be used in conjunction with a hearing aid A Neckloop can be used with hearing aids that have a telecoil An adaptor cord can be used with hearing aids that have direct audio input Williams Sound 13 Helping People Hear F A N Case OF DIFFICULTY If your Personal FM System is not working check the following 1 10 Make sure the batteries are fresh or completely charged and that the plus and minus terminals are installed corr
18. r R31 and R32 Receivers are engineered and designed to provide you with many years of reliable service Williams Sound warrants it against defects in materials and workmanship for FIVE 5 years EXCEPT FOR earphones headphones rechargeable batteries chargers cables antennas carry cases and all other accessory products Accessory products carry a 90 day warranty If the product fails within the specified warranty period Williams Sound will determine whether to repair or replace the defective equipment This warranty does not apply to physical damage products that have been abused or mis used or modified If you experience difficulty with your system call Toll Free for Customer Assistance 1 800 843 3544 If it is necessary to return the system for service your Customer Service Representative will give you a Return Authorization Number RA and shipping instructions Pack the system carefully and send it to Williams Sound Corp Attn Repair Dept 10321 W 70th St Eden Prairie MN 55344 Your warranty becomes effective the date you purchase your system Your returned warranty card is our way of knowing when your warranty begins It also gives us important information about your system including the serial number This information will help us serve you better in the future Please take a moment to complete the warranty card Thank you Williams Sound 7 Helping People Hear F A TECHNICAL SPECIFICATIONS FM TRANSM
19. rging directions see figure 9 1 IMPORTANT WARNINGS DO NOT ATTEMPT TO RECHARGE ZINC CARBON HEAVY DUTY ALKALINE OR LITHIUM BATTERIES DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES These batteries may heat up and explode causing possible injury and damage to the equipment Avoid shorting the plus and minus battery terminals together with metal objects Battery damage and burns can result Use only Williams Sound Supplied chargers and batteries 7 Williams Sound Helping People Hear FIGURE 10 USING THE OPTIONAL CHG 200A BATERY CHARGER TO CHARGE TRANSMITTERS AND RECEIVERS Step 1 Plug the CHG 200 s power supply into the Power Input on the charger s side and a standard AC wall outlet Step 2 Route the power cord around the Cord Hook see figure at right This will minimize strain on the cord and jack and insure that the power cord is not detached Charging Contact Holes during charging Make sure the receivers transmitters to be charged are turned OFF Place the receivers transmitters in the x slots so that the CHG 200 s Charging Pins and receiver s side panel contacts are coupled Make sure that the charging contact holes line up with the charging pins The receivers should drop easily into the slots DO NOT FORCE THEM IN BACKWARDS The Charging Indicators will light indicating that charging is in process Charging Pi It takes 14 16 hours to fully charge the b
20. to the T position on your hearing aid and adjust the volume control on the receiver to a comfortable level If you have two hearing aids with telecoils the signal will couple into both hearing aids when using INC 006 WC Direct Audio Input cords can be used with compatible hearing aids as well as with Cochlear Implant Processors If your hearing aid has a direct audio input boot you can obtain a cord from your hearing aid manufacturer to plug directly into the PFM receiver The cord should have a 3 5 mm plug 7 Williams Sound Helping People Hear MAMA ARAMAMA APPLICATIONS FOR VARIOUS HEARING LOSS LEVELS The Personal FM is designed to provide hearing assistance for anyone when background noise or distance from the sound source make listening difficult The microphone and transmitter are placed close to the desired sound source to help minimize background noise and to effectively eliminate the distance between the listener and the sound source Because hearing ability varies three categories of amplification have been delineated No HEARING Loss LOW AMPLIFICATION Among Low Amplification applications are classroom and similar uses The PFM System can be used with headphones or earphones for Central Auditory Processing Disorders Learning Disabilities or Attention Deficit Disorders The PFM System is used primarily to boost speech sounds above other background noises making it easier for the listener to focus on what is bein
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