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What percentage of hearing loss requires a hearing aid?

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A common type of hearing loss is one in which people have normal or nearly normal hearing in the low- and mid-pitched sounds, but have hearing loss in the high-pitched sounds. Some examples of low-pitched sounds in speech are vowel sounds like "o, ooh, ah, a, e," etc. Some examples of high-pitched sounds in speech are "s, f, th," etc. read more

Hearing aids are electrical devices that assist in optimizing perception of speech or other sounds. Most hearing aids are designed for hearing impaired individuals, of which there are approximately 37 million in the United States (Schiller et al 2012). A basic hearing aid consists of a microphone, amplifier, volume control, battery and receiver. read more

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Must whales and dolphins be subjected to deafening noise that will cause more than 3.5 million instances of temporary and/or permanent hearing loss? For species that depend on hearing for survival - to find food, migrate, and communicate - any hearing loss could be catastrophic. As one scientist noted, a deaf whale is a dead whale.
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