Our family at Coastal Hearing & Balance Center wish you and your family a very safe and Happy Holiday Season, and New Year!

Why do Hearing Aids Whistle?


The whistle that hearing aids make is called acoustic feedback. Acoustic feedback occurs as the result of sound leaking from the receiver and re-entering the hearing instrument through the microphone. When the sound is amplified for the second time, a whistle or squeal is produced.


Feedback can be very annoying, embarrassing, and in some cases can even prevent a hearing aid user from wearing the instrument. Newer hearing aids use a technology called “adaptive feedback cancellation” to detect the acoustic feedback and squelch it before it is even audible to listeners; thus, virtually eliminating this complaint.


Occasionally, however, feedback occurs as the result of an ill-fitting hearing instrument and/or wax build up in the ears. During these circumstances, a visit to your hearing healthcare specialist is most appropriate.


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