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Hard Wired
FM
Infrared
Telephones
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| The most common complaint about hearing loss is
the inability to understand speech in background noise. Even with
the most advanced circuits, sometimes, hearing aids are not enough to
conquer the adverse effects of noise. The amount of desired sound
compared to the amount of undesired sound is called the signal-to-noise
ratio. The better the signal-to-noise ratio, the more clearly
you will understand speech in noise. Assistive Listening Devices
(ALD's) improve the signal-to-noise ratio using remote microphones and
receivers to separate the speaker's voice from the background noise.
The images below demonstrate how properly used ALD's make speech much
clearer in the presence of background noise. |
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Hearing Aid Alone |
Hearing Aid and ALD |
The chart below shows some of the ways to connect your hearing
aids to an ALD.
| Connection Type |
Photo |
Description |
Hearing Aid Requirements |
| Neck Loop |
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Worn around the neck, the loop generates an
electromagnetic signal that is picked up by the Telecoil of the hearing
aid. |
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| Silhouette Inductor |
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Similar to a neck loop, but worn behind the
ear. Provides a stronger signal than the loop. |
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| Direct Audio Input (DAI) |
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Connects to a socket on the bottom of a Behind-The-Ear (BTE)
hearing aid. The DAI can connect to a variety of audio sources such
as ALD's, personal stereos, televisions, telephones and personal
computers. |
- BTE Hearing Aid
- Available DAI socket
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| Earphone or Earbud |
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For use by people who do not wear hearing aids, but need
some assistance in certain situations. |
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Use the buttons below to learn more about the available types
of ALD's.
   
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