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Hearing Aid Technology Promises Noise Reduction

by Rajashri on July 14, 2008 at 3:51 PM News on IT in Healthcare

Researchers from Washington University School of Medicine in St. Louis have developed a new hearing aid technology that can help people hear even in noisy environments.

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The new open fit hearing aids with directional microphones let ambient sounds into the ear canal, unlike more conventional hearing aids, which completely block off the canal, which creates an occlusion effect that makes wearers' own voices sound a little like they are talking from the bottom of a barrel.

Directional microphones have been available for many years on conventional hearing aids that help users distinguish conversation from background noise by partially cancelling out low frequency sounds coming from the sides and from behind.

Because open-fit aids let sound pass directly to the eardrum, some believe this will lessen their ability to decrease background sounds.

The researchers tested the new technology in a loud restaurant set up with sound of plates and silverware and the clamour of voices.

"One of the most common complaints I hear from people who wear hearing aids is that they have stopped going to restaurants because they can't communicate. So we are testing hearing aid technology that might better help people hear in noisy places," said Michael Valente, Ph.D., director of the Division of Adult Audiology in the Department of Otolaryngology at the School of Medicine.

"We have a sound room set up to be an exact duplication of being in a loud restaurant. It's real restaurant noise, and it allows us to realistically test hearing aids," he added.

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Hearing Aid Technology Promises Noise Reduction

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