Hearing Aids Market - Global Industry Analysis and Forecast 2014-2020
Hearing is the ability to perceive sound by hearing vibrations of of frequency ranging from 20 Hz to 20 kHz. The ear is divided into three parts: outer, middle, and inner ear. The outer ear comprises the auditory canal and ear drum, the middle ear comprises ossicles (stapes, malleus, and incus), and the inner ear comprises the auditory nerve and cochlea.
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