Why Do Hearing Aids Whistle?

posted By: Earlens Web | 03.14.18

Why Do Hearing Aids Whistle?


Hearing aid whistling, or “feedback”, can have a variety of causes. The main type of feedback is acoustic feedback. This type of feedback occurs when amplified sound from the hearing aid speaker is repeatedly picked back up by the hearing aid’s microphone. The result of this loop is a loud whistling sound, much like what sometimes happens when a microphone gets too close to the speaker during a lecture. The other main type of hearing aid feedback is mechanical feedback.


Today’s hearing aids often have feedback suppression features to help prevent whistling, which can be uncomfortable and occasionally embarrassing for the hearing aid wearer. In some cases, an audiologist may also adjust the hearing aid’s programming to reduce the risk of feedback.


One of the benefits of the Earlens Hearing Aid is a naturally reduced risk of feedback. That’s because Earlens does not have a speaker, so there are no amplified sound waves for the microphone to pick back up. As a result, Earlens eliminates the risk of acoustic feedback.


But how can Earlens amplify sound without a speaker? Like traditional hearing aids, Earlens captures sound with a microphone in the hearing aid Processor, which is worn behind the ear. However, unlike traditional hearing aids, Earlens then converts sound information into non-visible light. The light is sent down the ear canal to activate a tiny Lens to vibrate the eardrum. So, instead of amplified sound waves moving down the ear canal to move the eardrum, pulses of light signal a Lens to gently vibrate the eardrum. The result is a broader frequency range of sound, with crisp highs and full lows, more like in natural hearing. See how Earlens works.


If you currently struggle with hearing aid feedback and have mild to severe hearing loss, Earlens may be able to help. For an Earlens sound demo and trial, find an Earlens provider near you.


The Earlens Light-Driven Hearing Aid is one of the best hearing aids for providing audible amplification across a broad frequency range. Earlens is a digital hearing aid that uses light to transmit sound for the most complete hearing available from a hearing aid. Earlens automatically adjusts to noisy environments and uses a rechargeable battery with wireless charging for enhanced ease of use. Learn more about Earlens’ new hearing aid technology and full product details.

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