Noise Reduction In Hearing Aids
Recently in a local hearing clinic, a client�s concerns were discussed. �I�m afraid I won�t like them. My brother in law bought two hearing aids, and he keeps them in a drawer in the kitchen.� While the number of people dissatisfied with their hearing aids hovers around 50%, the hearing aid industry is hard pressed to decrease the number of returns, and increase the average daily use of each aid. In order to accomplish this, hearing aid manufacturers must answer the most often heard complaint: �It doesn�t work well in noise.�
Unfortunately, a hearing aid will never be able to accomplish the sifting and sorting that is carried out in the human brain. While a person with normal ...
Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers
|
compensation can be carried out in a hearing aid microphone. Most hearing aids today utilize omnidirectional microphones, which pick up sound equally from all directions. This may be beneficial and practical in some cases, as in the completely in the canal (CIC) aid. The CIC aid uses the natural funneling of the auricle in order to focus sound directly into the instrument. Behind-the-ear (BTE) and full concha in-the-ear (ITE) aids lose this anatomical feature, and may benefit from a directional microphone. �The purpose of using a directional microphone is to focus its sensitivity toward the front of the listener, thereby attenuating or reducing unwanted �noise� or competition emanating from behind the listener.� (Stach 1998)
Microphone directionality can be accomplished by using a single microphone with two sound inlets. In this mechanical method, the time lag created by a sound entering each inlet is precisely calibrated to cancel out sounds from the sides and back of ...
Get instant access to over 50,000 essays.
Write better papers. Get better grades.
Already a member? Login
|
of the input / output transducers and the coupler type. On the other hand DSP aids can alter the frequency response of an aid based on their design and/or programming. There are many techniques that can be used which are based on type of loss, but since speech encompasses such a wide frequency range, audiologists need to choose wisely which type of processing to use. Minimally, signal processing for noise reduction is analogous to a continually adjusting graphic equalizer for a home stereo system. Level dependent frequency response (LDFR) hearing aids can also adjust their �equalizer� settings based on input volume. Along with standard fitting techniques, subjective client ...
Succeed in your coursework without stepping into a library.
Get access to a growing library of notes, book reports,
and research papers in 2 minutes or less.
|
CITE THIS PAGE:
Noise Reduction In Hearing Aids. (2007, February 3). Retrieved May 19, 2025, from http://www.essayworld.com/essays/Noise-Reduction-In-Hearing-Aids/59745
"Noise Reduction In Hearing Aids." Essayworld.com. Essayworld.com, 3 Feb. 2007. Web. 19 May. 2025. <http://www.essayworld.com/essays/Noise-Reduction-In-Hearing-Aids/59745>
"Noise Reduction In Hearing Aids." Essayworld.com. February 3, 2007. Accessed May 19, 2025. http://www.essayworld.com/essays/Noise-Reduction-In-Hearing-Aids/59745.
"Noise Reduction In Hearing Aids." Essayworld.com. February 3, 2007. Accessed May 19, 2025. http://www.essayworld.com/essays/Noise-Reduction-In-Hearing-Aids/59745.
|
Save
Report