Williams Sound PFM R31 User Manual

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R31 PFM Model • Receiver FM PersonalHelper Hearing

Hearing HelperPersonal FM Receiver •Model PFM R31

Description:

Maximize a student’s ability to listen with the Personal FM R31 receiver from Williams Sound. The PFM R31 will ensure that everyone in the classroom can hear the speaker’s message clearly and easily. Each receiver has a range of up to 150 feet, and will operate up to 80 continuous hours. Versatile 3.5 mm jack allows for a variety of earphone and headphone options, or, equip it with a neckloop to make it compatible with most telecoil-equippedhearing aids.

The PFM R31 features a sensitive environmental microphone which gives the listener more flexibility on what they want to hear. By turning on the environmental mic, they can listen to a nearby classmate speak more clearly.

Applications:

Classrooms • Job Consultation • Job Training • Tours • Group Meetings

PFM R31 FM Receiver:

Dimensions:

3-5/8"L x2-3/8"W x 7/8" H (92.1 mm x 60.3 mm x 22.2 mm)

Weight:

4.6 oz (130 g) with batteries

Color:

Royal blue, shatter-resistantpolypropylene

Battery Type:

Two (2) AA 1.5 V non-rechargeableAlkaline 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 14–16hours, uses CHG 200 Charger

Operating Freq’s:

Pre-tuned,field–tuneable,72 MHz - 76 MHz*.

 

Pre-setchannels are E (72.9 MHz) and G (75.7 MHz).

FM Deviation:

Wide-band,75 kHz, 75 µSde-emphasis

AFC Range:

± 120 kHz

Sensitivity:

4 µV at 12 dB Sinad with squelch defeated,

 

squelches at 10 µV for min. 50 dB S/N ratio

Freq Response:

100 to 10 kHz, + 3 dB

Signal-to-NoiseRatio:

50 dB at 10 uV

Receive Antenna:

Integral with earphone cord

Audio Output:

35 mW, max. at 16 Ω

Output Connector:

3.5 mm mono phone jack

Squelch:

Set to turn off audio under weak or no signal condition

Carrier Detect Ind:

Red LED, turns on in the presence of a carrier

Controls:

 

Volume:

Rotary, On/Off/Volume

Tone:

3-wayslide switch; Lo: flat response (20 Hz), Mid:-3dB at 235

 

Hz, Hi: -3dB at 730 Hz

Channel:

2-wayslide switch; Ch 1 = 72.9 MHz, Ch 2 = 75.7 MHz

Indicators:

On/Off and FM

Mic Connector:

3.5 mm mono phone jack, supplies positive DC for Williams

 

Sound electret mics

Microphone:

Plug mount electret, omnidirectional, with windscreen, 3.5 mm

 

mono phone plug (MIC 014)

Mic Volume:

Rotary control

Note:

Specifications are electrical performance

Approvals:

FCC, WEEE

Warranty:

5 years, parts and labor**

On

Mic Jack IndicatorMic

Volume

EAR

FM

Mic

MIC

On

 

FM

Max Min

 

Max

Off

 

FM

FM

Mic

Indicator

Volume

Jack

R31 Top

Williams Sound

Hearing Helper ®

R31 Front

Tone

Channel

Control

1 or 2

 

 

 

 

 

 

 

 

*DISCLAIMER: FCC RULES LIMIT USE OF THIS EQUIPMENT TO AUDITORY ASSISTANCE

R31 Back

FOR THE HANDICAPPED.

 

**90 days on accessories.

 

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

 

 

 

 

 

©2007, Williams Sound Corp. MCAT 005B

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R31 PFM Model • Receiver FM PersonalHelper Hearing

Hearing HelperPersonal FM Receiver •Model PFM R31

Acoustic Specifications:

ANSI 2.44 Test

FM Response (PFM R31)

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 OCT LOG

Main X:

4 kHz

ANSI S3.22–1987Test

FM Response (PFM R31)

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 dB in

Reference Test Gain:

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

 

 

Medium Low Cut (Tone Set to Mid)

Max. SSPL90:

HF Avg. SSPL90:

HF Avg. Full On Gain:

Reference Test Gain:

Response Limit:

Total Harmonic Dist:

135.5 dB at 600 Hz

127.1 dB

36.8 dB at 60 dB in

37.3 dB

79.4 dB

F1=200 Hz, F2=8 kHz

3.4 % at 500 Hz

3.4 % at 800 Hz

2.2 % at 1600 Hz

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

Environmental Mic Response (PFM R31)

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:

4 kHz

Maximum Low Cut (Tone Set to Hi)

 

Max. SSPL90:

133.5 dB at 1000 Hz

HF Avg. SSPL90:

127.0 dB

HF Avg. Full On Gain:

35.4 dB at 60 dB in

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 % at 1600 Hz

 

 

Environmental Mic Response (PFM R31)

No Tone Modification

Max. SSPL90:

HF Avg. SSPL90:

HF Avg. Full On Gain:

Reference Test Gain:

Response Limit:

Total Harmonic Dist:

134.8 dB at 500 Hz

126.4 dB

40.9 dB at 60 dB in

40.8 dB

81.1 dB

F1=200 Hz, F2=8 kHz

1.1 % at 500 Hz

1.1 % at 800 Hz

0.3 % at 1600 Hz

 

©2007, Williams Sound Corp. MCAT 005B

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R31 PFM Model • Receiver FM PersonalHelper Hearing

Hearing HelperPersonal FM Receiver •Model PFM R31

Bid Specs:

Not Currently Available

Contact:

United States

Williams Sound Corp.

10321 W. 70th Street

Eden Prairie, MN 55344-3446

Ph: 800-328-6190 /952-943-2252 /FAX:952-943-2174Email: info@williamssound.com

Web: www.williamssound.com

Canada

Thorvin Electronics

2861 Sherwood Heights Dr. Units 36-37Oakville, ONL6J-7K1Canada

Ph: 800-323-6634 /905-829-3040 /FAX:905-829-4196Web: www.thorvinelectronics.com

Asia, Australia, Latin America, Middle East, South Africa

International Sales Department Williams Sound Corp.

10321 W. 70th Street

Eden Prairie, MN 55344 USA Phone: +1 952 224 7791 Fax: +1 952 943 2174

Email: info@williamssound.com Web: www.williamssound.com

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

 

©2007, Williams Sound Corp. MCAT 005B

3