That whistle is called feedback, and it usually means sound is leaking out of your ear and being picked up again by the microphone. The most common causes are a loose fit, a build-up of ear wax, or a worn dome or tube. Many cases are easy to fix at home, but whistling that will not stop is worth getting checked.
If you have ever wondered why are my hearing aids whistling, you are not alone, and the good news is the answer is usually simple. That high-pitched squeal is known as feedback, and it happens when sound escapes from your ear and loops back into the device. In this guide we explain what causes it, the quick fixes you can try yourself, and when it is time to book a hearing aid repair.
What is hearing aid feedback?
Your hearing aid picks up sound with a microphone, makes it louder, and delivers it into your ear canal. Feedback happens when some of that amplified sound leaks back out, gets picked up by the microphone again, and is re-amplified in a loop. The result is the familiar whistle. A brief whistle as you put an aid in, or when you cup your hand over your ear, is normal. A whistle that keeps going while the aid is in place is the sign that something needs attention.
The most common reasons hearing aids whistle
Most whistling comes down to one of a handful of causes. The table below covers what you might notice and what to do about each:
| Likely cause | What you might notice | What to do |
|---|---|---|
| Loose or poor fit | Whistles constantly, worse when you move your jaw | Reinsert firmly; if it keeps slipping, ask about a refit |
| Ear wax build-up | Whistling plus muffled or reduced sound | Have the wax removed; do not use cotton buds |
| Worn dome or tubing | Whistle started recently with no other change | Replace the dome or tube |
| Volume set too high | Whistles only at high volume | Lower the volume a little |
| Cracked casing or moisture | Crackling or cutting out as well as whistling | Book a repair |
Simple fixes you can try at home
Start by taking the aid out and putting it back in, making sure it sits snugly and the dome is fully in your ear canal. Check the dome for splits or a poor fit, and swap it for a fresh one if you have spares. Clean the aid and replace the wax guard, since a blocked filter can change how sound behaves. Finally, try turning the volume down a notch. These steps clear up a surprising number of whistles in a minute or two.
When ear wax is the culprit
Ear wax is one of the most common and most overlooked causes of whistling. When wax builds up against the eardrum, the amplified sound bounces back off it instead of being absorbed, and that reflected sound feeds straight back into the microphone. You will often notice your hearing seems duller at the same time.
It is important not to try to dig the wax out yourself. The NHS advises against poking anything into your ears to clear wax, as this tends to push it deeper and make matters worse.
Safe, gentle ear wax removal in Leicester using microsuction clears the blockage quickly and often stops the whistling at the same time.
When to book a repair
If the whistle persists after you have refitted the aid, replaced the dome, and ruled out wax, it is time for a professional look. Cracked tubing, a damaged casing, moisture inside the device, or simply an ageing aid can all cause ongoing feedback that home fixes will not solve.
A professional repair can diagnose and fix the fault, and a regular aftercare package helps prevent problems like this before they start.
Preventing whistling in the future
A little daily care goes a long way. Wipe your aids each evening, keep domes and wax guards fresh, and dry the devices overnight if you live somewhere humid or sweat a lot. It is also worth remembering that ears change shape slowly over time, so an aid that fitted perfectly a few years ago may need a refit. If yours no longer feels secure, a quick review of your hearing aids and fit will get you comfortable and whistle-free again.
Frequently asked questions
Is it normal for hearing aids to whistle?
A brief whistle as you insert the aid or when something covers your ear is normal. A whistle that continues while the aid is in place is not, and usually points to fit, wax, or a worn part.
Why do my hearing aids whistle when I put them in?
A short whistle during insertion is normal and should stop once the aid is seated correctly. If it carries on, the dome may not be fully in or the fit may be loose.
Can ear wax make my hearing aids whistle?
Yes, very commonly. Wax against the eardrum reflects amplified sound back into the microphone, causing feedback. Having the wax removed safely often stops the whistling straight away.
Why do they whistle when I hug someone or put on a hat?
Covering your ear reflects the sound back towards the microphone, which causes a brief whistle. This is normal and stops as soon as your ear is uncovered.
Can I fix a whistling hearing aid myself?
Often, yes. Reinsert the aid snugly, check and replace the dome, clean it and change the wax guard, and try lowering the volume. If the whistle continues, book a professional check.
When should I see someone about feedback?
If whistling persists after the simple fixes, or comes with crackling, cutting out, or muffled sound, have the aid checked. Cracked tubing, moisture, or wax may be to blame.
Do newer hearing aids still whistle?
Modern aids have much better feedback management, but they are not immune. Wax, a loose fit, or a worn part can still cause whistling on even the latest devices.
Is a whistle driving you mad? We carry out hearing aid repairs, safe ear wax removal, and fit checks here in Leicester. Get in touch and we will get your hearing aids working as they should.
