Assisted Listening Devices
Transmitters – The FM Transmitter is worn by the teacher, speaker or parent. It is actually a microphone and transmitter working together. Transmitters can also be connected directly to a TV or computer. The transmitter picks up the sound coming into the microphone, then sends (transmits) the sound directly to the receiver that is connected to the hearing aid. There are different styles of transmitters and microphones – click on the “Transmitters” link on the left for additional information and pictures of Amigo Transmitters.
Receivers – The FM receiver is the part of the FM solution that typically plugs into the bottom of the hearing aid. If two hearing aids are worn, usually two receivers are worn – one on each hearing aid. You may be able to attach the receiver directly to the hearing aid or connect it using an adaptor boot or “shoe”. The FM receiver picks up the sound that is sent by the FM transmitter. So when the teacher or speaker talks, it will sound like they are speaking directly into the child’s ear. Some FM receivers are not connected to the hearing aids, but rather are worn on the body.
Accessories – Working with FM systems may require additional accessories like microphones, rechargeable batteries, headphones and auxiliary cables.
Loop systems - A hearing loop, typically installed on the floor around the periphery of a room, is a thin strand of copper wire radiating electromagnetic signals that can be picked up by a tiny receiver already built into most hearing aids and cochlear implants. When the receiver is turned on, the hearing aid receives only the sounds coming directly from a microphone, not the background noise.
The basic technology, called an induction loop, has been around for decades as a means of relaying signals from a telephone to a tiny receiver called a telecoil, or t-coil, that can be attached to a hearing aid. As telecoils became standard parts of hearing aids in Britain and Scandinavia, they were also used to receive signals from loops connected to microphones in halls, stores, taxicabs and a host of other places.
January 30, 2012