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My hearing aid makes a whistling sound, what is causing that?

April 26, 2017causing hearing aid sound whistling

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My hearing aid makes a whistling sound, what is causing that?

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Feedback is a common concern for hearing aid wearers. This “whistling” sound can be caused by a number of things but is often the result of too much wax in the ear canal, a loose fitting hearing aid or a surface too close to the hearing aid microphone. Newer technology uses various types of feedback control systems to help reduce this annoying sound.