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The IR Rx is a compact receiver for infrared assistive listening systems, and forms the user component in the Infra~Hear™ range of products.
Using high frequency modulation at 2.3MHz the Infra~Hear™ products are immune to interference from energy saving lighting and plasma displays.
The receiver is battery powered from standard AAA batteries with a life of over 30 hours between charges, saving the expence of custom battery packs and chargers.
The volume control has a positive snap, and enables users with limited mobility to use the system.
Due to its compact design the unit can be discreetly worn, suspended by the integral neck loop, even when using the external headphone socket.
The ability to add external headphones allows the receivers to be used by non hearing aid wearers in museum tour guide systems or for secondary language translation systems, or simply to test operation of the receiver without stocking two receiver types.
Infra red light will not pass through walls, ensuring security in sensitive locations such as courts and council chambers.
|
Modulation |
wideband FM |
| Nominal deviation |
± 50 kHz |
| Carrier frequency | .3 MHz |
| Audio output power | 40mW |
| Loop Field | 400mAM-1 |
| Frequency response | 30-18,000 Hz |
| THD (1 kHz, nom. dev.) | <1% |
| Audio signal-to-noise ratio | >60 dB(A) rms |
| Headphone output | 3.5mm mono jack |
| Headphone impedance | Minimum 16 Ω |
| IR diodes | 2@ 875nM |
| Reception Angle | 120o |
| Receiving power | minimum 1mW |
| Operating voltage | 2.3-3.3 V DC |
| Batteries | 2 off AAA |
| Current consumption | approx. 30 mA |
| Dimensions | Height 39mm Width 110mm Depth 28mm loop 400mm Diameter Weight approx. 70g |