Hearing Aids Procedures and tests

Behind the ear aid A hearing aid is a device used to help hard-of-hearing people hear sounds better. In the past, a funnel-like amplification cone, called an "ear trumpet" or "ear horn", was used. Also sometimes used was a desk with a built-in amplifier into which a microphone and earphones could be plugged; these worked better than passive ear trumpets but were not portable. Now, however, the most common style is a small electronic device that fits into the wearer's ear. The first var ...