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Hearing Aid A hearing aid is an instrument that brings sound more effectively to the listener's ear, helping hearing impaired people hear sounds better. Early devices were passive, and attempted to gather sound energy and direct it to the ear. A funnel-like amplification cone called an "ear trumpet" or "ear horn" was one of the first such devices. Today, the most common hearing instrument is the electro acoustic aid, a small electronic device that typically fits in or behind the wearer's ear. |
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Sutherland Shire Hearing Aid Business Directory and Community Guide |
