Skip to main content

Why is my hearing aid whistling?

Whistling, or feedback, happens when sound from the hearing aid leaks back out and is picked up again by its own microphone. It is usually easy to fix, and often the cause is earwax.

Book Earwax Removal →Call 07442 499414
Hearing aids  ·  3 min read  ·  By our HCPC registered audiologists  ·  15 October 2026

Common causes

  • Not inserted properly. If the dome or mould is not seated fully, sound escapes.
  • Earwax. A build-up in the ear canal bounces sound back towards the microphone. One of the most common causes.
  • A worn or wrong-sized dome. Domes soften and lose their seal over time.
  • A loose mould. Ears change shape, especially with weight change, so moulds can become loose.
  • Something near the ear. A hand, a hat, a hug or a phone held close.
  • Volume too high, or settings that need adjusting.
  • Damage, such as a cracked tube or a fault in the receiver.

Quick fixes to try

  1. Take the aid out and reinsert it carefully, making sure it is fully in.
  2. Check the dome or mould for wax, and clean or replace it.
  3. Change the wax guard.
  4. Turn the volume down a step.
  5. Check tubes for cracks or hardening.

Whistling when you cup your hand over your ear or put a phone to it is normal. Constant whistling is not.

Whistling that will not stop?

It is very often earwax. Microsuction clears it in about 30 minutes, £60 for both ears.

Book Earwax Removal →

When to get help

If whistling continues after these checks, your ears may need wax removal, or the fit or settings may need adjusting. Microsuction clears wax quickly, and if you wear hearing aids from us, adjustments are part of your aftercare. We also repair all major brands.

Frequently asked questions.

No, but it is a sign something needs attention, and it can be annoying for you and those around you.

Pillows and headrests reflect sound back to the microphone. It is normal and stops when you sit up.

Modern hearing aids have strong feedback cancellation. Persistent whistling with new aids usually means the fit or settings need adjusting.

Stop the whistling.

Earwax removal, adjustments and repairs, in clinic or at home.

Book Earwax Removal →Call 07442 499414

Earwax removalHearing aid repairsHearing aid not working?Caring for your hearing aids

Written and clinically reviewed by our HCPC registered audiologists. Last reviewed: 15 October 2026. This page is general information, not a diagnosis. If you are worried about your hearing or your ears, book an appointment or speak to your GP.