May 10, 2012

Buying a Hearing Aid?

Linda Barton asked:

Before buying a hearing aid, ask your audiologist these questions:

Which features would be most valuable to me?

What constitutes the total price of the hearing aid? Do the benefits of the latest technical advancements outweigh the larger prices?

What is the duration of the warranty? Is it conceivable to extend it? Does the guarantee include upcoming maintenance and repairs?

What is the test period to trial the hearing aids? (Just about all makers provide a 30 - 60-days trial period that hearing aids may be taken back for a refund.) What fees will not be refunded if the hearing aid is brought back after the trial time period?

Can the audiologist provide adjustments and supply servicing and do small repairs? Will lender aids be supplied while repairs are being carried out?

What education does the audiologist give?

New kinds of hearing aids

Though they work differently than hearing aids fitted externally, implantable hearing aid design serves to increase the transmission of sound vibrations going in the inner ear. Middle ear implants (MEI) are very small devices connected to bones within the middle ear. Rather than magnifying the sound running to the eardrum, the MEI moves the bones themselves. Both of these methods present the equivalent effect of fortifying audio vibrations entering the inner ear so they can be sensed by individuals suffering from nerve deafness.

Bone-anchored hearing aids (BAHA) are small devices that attach to bone located behind the ear. These devices transmit sound vibrations straight into the inner ear via the skull, without going in to the middle ear. Generally BAHAs are used by persons with middle ear troubles or hearing loss in one ear. Since a surgical procedure is needed to implant either one of these devices, a lot of hearing specialists are of the opinion that the benefits might not be enough to outweigh the risks.

Current research on hearing aids

Methods are being well thought out by researchers to implement new signal processing strategies to hearing aid design. Signal processing represents the technique in use to alter normal audio waves to amplify sounds to best match the remaining hearing of a someone using a hearing aid. NIDCD funded researchers are also studying how to make hearing aids intensify language signals to help to improve understanding.

In addition, research is checking into the use of computer aided technology in planning and constructing more efficient hearing aids. Investigators continue to look for ways to improve sound transferring to cut back on feedback, noise interference and the blockage effect. Additional fields of study centre on the most advantageous methods to select and fit hearing aids to children and other groups whose hearing ability is hard to analyse.

Some other promising research centres on using lessons acquired from animal examples to aim for improved microphones to be used in hearing aids. NIDCD backed scientists are analysing the midget fly Ormia ochracea since they have an ear structure that lets the fly ascertain the origin sounds very easily.

The fly has an ear structure that is being used by scientists as a framework for designing tiny directional microphones for use in hearing aids. The microphones exaggerate the sound originating from a specific focus (commonly the direction an individual is facing), without the sounds that come from a different direction.

Directional microphones hold extraordinary promise in making it far easier to hear an individual conversation, even whilst enclosed by other voices and noises.

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