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Cochlear Hearing Impairment Research Paper

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Cochlear hearing impairment is often times associated with damage to one’s hair cells within the cochlea. The cochlea is a small, snail-shaped structure and it is one of the main organs of hearing and it is a part of one’s inner ear. When an individual has “cochlear damage” this means that a part (or sometimes all) of your inner damage has been damaged and/or hurt. Damage to the cochlea usually results in permanent hearing loss (and this type of hearing loss is known as sensorineural hearing loss). This type of hearing loss can be caused by many factors such as loud or extended noise exposure, certain antibiotics, meningitis, Meniere’s disease, or acoustic tumors.

If there is damage to the outer hair cells (often times abbreviated as OHCs), …show more content…
The primary goal of hearing aids today is to help restore audibility via frequency selective amplification (Edwards 2007). However, one of the downsides of this application is that many sounds that are encountered in everyday life would become unpleasantly sound, and the user would hear more sounds than what they bargained for. One solution to this would Automatic Gain Control (also known as AGC). With AGC, weak sounds can be amplified more than strong ones, and thus this allows a wide dynamic range of the input signal and it being compressed into a smaller dynamic range at the output. Another idea was to relieve the user of the need to adjust the volume control (through the use of an application called the “automatic volume control” also known as AVC). AVC systems change their gain slowly with changes in sound level by making the recovery time of the AGC circuit (usually a few hundred milliseconds longer) (Edwards …show more content…
Another method used in hearing aids attempting to improve speech intelligibility using digital signal processing techniques to enhance speech in background noise (as noted in the paragraphs above about how one of the major difficulties for those with cochlear hearing loss was hearing in background noise). However, digital processing has had limited success, however of course with new technology coming out every day, the possibilities for the future could change. Other improvements currently available for improving the intelligibility of speech in noise can be obtained by using directional microphones (Edwards

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