Williams Sound PFM 350 RCH specifications PFM R31 FM Receiver, R31 Top, R31 Front R31 Back

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Hearing HelperPersonal FM System • Model PFM 350 RCH

Hearing HelperPersonal FM System • Model PFM 350 RCH

ADA

PFM R31 FM Receiver:

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)

 

 

Weight:

 

 

 

4.6 oz (130 g) with batteries

 

 

 

 

 

 

Color:

 

 

 

Royal blue, shatter-resistant polypropylene

 

 

 

 

Battery Type:

 

 

 

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

 

FCC ID:

 

 

 

CNM R31

 

 

 

 

 

 

 

Operating Freq’s:

 

 

 

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

 

 

 

 

 

 

 

 

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

 

 

 

 

FM Deviation:

 

 

 

Wide-band, 75 kHz, 75 µS de-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-Noise Ratio:

 

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-way slide switch; Lo: flat response (20 Hz), Mid: -3 dB at 235 Hz, Hi: -3 dB at 730 Hz

Channel:

 

 

 

2-way slide 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

 

 

 

 

Warranty:

 

 

 

5 years, parts and labor (90 days on accessories)

 

 

 

 

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

 

 

FOR THE HANDICAPPED.

 

 

 

 

 

 

 

 

 

 

FM Volume

 

On Indicator

 

 

 

 

 

 

 

Mic Jack

 

 

 

 

 

Mic

 

 

 

 

 

 

EAR

FM

On Mic

MIC

Volume

 

Williams Sound

 

 

 

 

FM

 

 

 

 

 

 

 

 

 

 

 

FM

 

 

 

 

Mic

 

Hearing Helper

®

 

Tone

Channel

Indicator

 

Off

Max Min

Max

Jack

 

 

 

Control

1 or 2

 

 

 

 

 

 

 

 

 

 

 

R31 Top

R31 Top

R31 Front

R31 Rear

R31 Front

R31 Back

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

©2006, Williams Sound Corp. MCAT 041B

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Contents T32 Top DescriptionPFM T32 FM Transmitter T32 FrontR31 Front R31 Back PFM R31 FM ReceiverR31 Top FM Response PFM R31 Acoustic Specifications Ansi 2.44 TestAnsi S3.22-1987 Test Environmental Mic Response PFM R31United States Bid SpecsContact Canada

PFM 350 RCH specifications

The Williams Sound PFM 350 RCH is a cutting-edge assistive listening device designed to enhance audio clarity for users in various environments, such as classrooms, auditoriums, and public venues. This device is particularly beneficial for individuals with hearing loss, allowing them to engage more fully in conversations, presentations, or performances.

One of the standout features of the PFM 350 RCH is its robust frequency response, which ranges from 40 Hz to 18 kHz. This broad spectrum ensures that users experience rich sound quality with minimal distortion, providing a more natural listening experience. The device incorporates a 32-channel receiver, allowing users to select from multiple frequency channels, thus minimizing interference from other wireless devices operating in the vicinity.

The PFM 350 RCH utilizes the latest FM transmission technology, which provides a reliable and clear audio signal even in challenging environments. It operates within the 72-76 MHz frequency range, a band designated for assistive listening devices, which ensures compliance with regulatory standards and compatibility with various systems. Additionally, the device features a wide range of operating distances, making it suitable for both small and large venues.

An important aspect of the PFM 350 RCH is its user-friendly design. The lightweight build makes it easy to wear for extended periods, and the adjustable volume control allows users to customize their experience to suit individual needs. The device also boasts a long battery life, with the capacity to operate for up to 40 hours on a single charge, ensuring it is always ready for use.

Moreover, the PFM 350 RCH integrates seamlessly with headphones and neck loops, enhancing accessibility for a diverse range of users. Its compatibility with various audio sources broadens its application across different settings, including educational institutions, theaters, and places of worship.

In terms of build quality, the PFM 350 RCH is designed to be both durable and portable, making it suitable for frequent use. Its ergonomic design means it can be easily transported and stored, facilitating ease of access for both users and facilitators.

In conclusion, the Williams Sound PFM 350 RCH stands out as an advanced solution for anyone seeking to improve their auditory experience in various environments. With a combination of high-quality sound, user-friendly features, and versatile application, it effectively meets the needs of individuals with hearing challenges, ultimately promoting inclusion and engagement in societal activities.