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Consumer Electronics by S. P. Bali

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HEARING AIDS

The basic function of a hearing aid is to amplify sound in such a way that it is made audible to the hearing aid user. Although many types of hearing aids are available, they all share a number of common features. We will look in some detail at the various hearing aid types, their components and electroacoustic characteristics.

Full Concha Model

The full concha model will occupy most of the concha of the outer ear. It can provide more amplification and output than the canal model. A variation of this model is called a “semi” or “half' concha, in which the helix part, or most of it, is removed.

Canal Models

Canal aids, especially in their CIC format (Completely In the Canal) are the smallest type of hearing aid available. Because ...

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