Hearing Helper™ Personal 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-equipped hearing 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 class-
mate speak more clearly.
Applications:
Classrooms • Job Consultation • Job Training • Tours • Group Meetings
PFM R31 FM Receiver:
On
Indicator
Dimensions:
3-5/8" L x 2-3/8" W x 7/8" H (92.1 mm x 60.3 mm x 22.2 mm)
Mic
Mic Jack
Volume
Weight:
Color:
Battery Type:
4.6 oz (130 g) with batteries
FM
Mic
EAR
MIC
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
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 µS de-emphasis
120 kHz
4 µV at 12 dB Sinad with squelch defeated,
squelches at 10 µV for min. 50 dB S/N ratio
100 to 10 kHz, + 3 dB
50 dB at 10 uV
Integral with earphone cord
On
FM
Off
Max Min
Max
FM
FM
Mic
Indicator Volume
Jack
R31 Top
Operating Freq’s:
FM Deviation:
AFC Range:
Sensitivity:
Williams Sound
Hearing Helper®
Freq Response:
Signal-to-Noise Ratio:
Receive Antenna:
Audio Output:
Output Connector:
Squelch:
35 mW, max. at 16 Ω
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
Carrier Detect Ind:
Controls:
R31 Front
Volume:
Tone:
Rotary, On/Off/Volume
3-way slide switch; Lo: flat response (20 Hz), Mid: -3 dB at 235
Hz, Hi: -3 dB at 730 Hz
Channel:
Indicators:
2-way slide switch; Ch 1 = 72.9 MHz, Ch 2 = 75.7 MHz
On/Off and FM
Tone
Control
Channel
1 or 2
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:
Note:
Approvals:
Warranty:
Rotary control
Specifications are electrical performance
FCC, WEEE
5 years, parts and labor**
*DISCLAIMER: FCC RULES LIMIT USE OF THIS EQUIPMENT TO AUDITORY ASSISTANCE
FOR THE HANDICAPPED.
R31 Back
**90 days on accessories.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2007, Williams Sound Corp. MCAT 005B
1
Hearing Helper™ Personal 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: 952-943-2174
Email: [email protected]
Canada
Thorvin Electronics
2861 Sherwood Heights Dr. Units 36-37
Oakville, ON L6J-7K1 Canada
Ph: 800-323-6634 / 905-829-3040 / FAX: 905-829-4196
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: [email protected]
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2007, Williams Sound Corp. MCAT 005B
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