Why does my hearing aid make a whistling sound at times?Updated a month ago

Whistling is common in hearing aids and is also known as 'feedback'. This phenomenon is caused by amplified sound leaving the ear, being received back into the microphone, and being re-amplified. The following tips will help reduce the effect of whistling/feedback noise:

1. Lower the volume. Keep the volume at a lower setting before inserting the hearing aid in your ear.
2. Secure the positioning of the ear dome within the ear. Feedback/whistling noise will stop when the hearing aid is securely fitted/sealed in the ear with the best-fitting dome size.
3. Clean the ear dome, and/or tube. Try removing and cleaning the hearing aid with the cleaning brush.
4. Clear the ear canal of wax or debris. Seek guidance from your physician for excessive wax build-up.
5. Replace the ear cap, dome or tube. Change to a new dome with a better-fitting size. If the ear dome is torn or broken, replace it.