The feedback loop, simply
Sound meant for the ear canal escapes past a gap or reflects off wax, re-enters the microphone, and amplifies into a whistle. Close the leak and the loop breaks — no new device required.
Hearing Aid Feedback Guide
Why Your Parent's Hearing Aid Whistles — And How to Stop It
If your mother's or father's hearing aid whistles loud enough that the whole family notices, it is almost never a broken device. This squeal is acoustic feedback, and it usually means the ear mould has loosened, wax has built up, or the volume is set too high — all fixable, often at home tonight. Below is how to spot the cause, stop the noise, and know when a remould or professional refit is genuinely needed. Remember: a hearing aid manages hearing loss, it does not cure it, so the goal is a clean, comfortable fit that keeps sound where it belongs.
Written & clinically reviewed by the Prudent Hearing clinical teamRCI-registered audiologists (MASLP / BASLP)Last updated 5 September 2026
What that whistling (acoustic feedback) actually is
That high-pitched squeal is called acoustic feedback. It happens when amplified sound leaks back out of the ear, gets picked up by the aid's microphone, and loops around again — the same effect as a mic held too close to a speaker. It tells you sound is escaping somewhere it should not; it rarely means the electronics have failed.
Why your parent may not hear it
High-pitched feedback sits exactly where age-related hearing loss is worst. Your parent may genuinely not notice a whistle the rest of the room finds obvious, so trust your own ears rather than their reassurance that everything is fine.
Cause 1: A loose, old, or poorly fitting ear mould
The most common cause is a mould or dome that no longer seals the ear canal. Ear shape changes with age and weight loss, and silicone moulds harden and shrink over two to three years. A tiny gap is all feedback needs to start.
Signs the mould has loosened
Whistling that starts or worsens when your parent chews, smiles, lies down, or turns their head points to a seal that shifts with movement rather than a faulty aid.
Why old moulds leak
Moulds fitted years ago slowly stiffen and stop flexing to the canal. If the impression was taken more than two to three years ago, the mould — not the aid — is the likely culprit.
Cause 2: Wax buildup in the ear or the aid
Wax is the second big culprit, and it works in two ways. A plug of wax in the canal reflects amplified sound straight back into the microphone, and wax or debris clogging the aid's receiver or vent changes how sound behaves. Both are very common in older ears.
Wax in the ear canal
A wax plug acts like a wall, bouncing sound back toward the microphone. Have the ears checked before assuming the aid is at fault — a two-minute look often solves the whole problem.
Wax or debris in the aid
Blocked receivers, clogged wax guards, and dirty vents disturb the sound path and invite feedback. Daily wiping and fresh wax guards prevent most of this.
Cause 3: Volume set too high or cracked tubing
Turning the volume up to compensate for a worsening whistle usually makes it worse — more gain means more sound to leak and loop. On behind-the-ear aids, the thin tube is a second suspect: it hardens, cracks, or pulls loose over time and lets sound escape.
Volume set too high
Excess amplification overwhelms the seal and triggers feedback. If your parent keeps nudging the volume up, the fit or programming needs review — not more volume.
Cracked or hardened tubing
On BTE aids, tubing that has yellowed, stiffened, or split lets sound leak out. Replacement tubing is inexpensive and quick to fit at a clinic or home visit.
Quick fixes you can try at home tonight
Before booking anything, run through this short checklist. Many whistles disappear in a few minutes, and the ones that do not tell you exactly what to raise at the appointment.
Reinsert firmly
Remove the aid and push it back in until it seats fully and snugly. A rushed or partial insertion is the single most common cause of feedback, especially with arthritic hands.
Turn the volume down one step
Lower it a notch and see if the squeal stops. If normal conversation then feels too quiet, that is a clear sign the fit or settings need attention.
Clean the aid and check the dome
Wipe the aid, replace the wax guard, and confirm the dome or mould is not torn, twisted, or the wrong size after a battery or dome change.
Inspect the tubing and ears
Look for cracked or hardened tubing, and check whether the ears feel blocked with wax. If either looks off, note it so we can sort it in one visit.
When it needs a remould or professional refit
If the whistle persists after clean insertion, cleaning, and a volume check — or keeps returning over weeks — it is time for professional help. This does not mean a new hearing aid. Most feedback is solved with a fresh mould, new tubing, or re-tuning the aid's built-in feedback manager.
Signs it's time for a remould
Persistent feedback despite a good seal, or a mould more than two to three years old, usually means a new impression and remould rather than a new device.
See hearing aid optionsWhat a refit involves
An audiologist re-checks the canal, takes a fresh impression if needed, replaces tubing, and re-tunes the feedback settings — often within a single appointment.
Book a checkCost, honestly
A remould or new tubing costs a small fraction of a new aid, and hearing aids themselves are GST-exempt. We will confirm an exact quote for your parent's model — call +91 9429690093.
View pricingBook a free fit & feedback check near you
You do not have to solve this over the phone or drag a reluctant parent across the city. Prudent Hearing Solutions has RCI-registered audiologists (since 2004) in Pune, Delhi and Bengaluru — and we do home visits in all three, so the fit and feedback check can happen in your parent's own chair. We service all eight major brands, so it does not matter where the aid was bought.
Pune
Viman Nagar head office, with home visits across Pune and PCMC for parents who would rather not travel.
Pune clinic & home visitsDelhi
Clinics at Rohini Sector 9 and Green Park, plus home visits across Delhi.
Delhi clinics & home visitsBengaluru
Jayanagar 4th Block clinic, with home visits across the city.
Bengaluru clinic & home visitsPrefer we come to you?
A free 45-minute check at home covers the ears, the mould, the tubing, and the settings — no pressure, and try-before-you-buy if a change is needed.
Book a home visitFrequently asked questions
Does a whistling hearing aid mean it is broken?
Almost never. Whistling is acoustic feedback — sound leaking out and looping back into the microphone. It usually points to a loose mould, wax, cracked tubing, or the volume set too high, all of which are fixable without replacing the aid.
Can I stop the whistling myself at home?
Often, yes. Reinsert the aid firmly, turn the volume down one step, wipe the aid and replace the wax guard, and check the dome, tubing and ears for wax. If the whistle stops, you have found the cause. If it keeps returning, book a professional check.
My parent insists there is no whistling — are they imagining it?
No. High-pitched feedback sits in the exact frequency range where age-related hearing loss is worst, so your parent may genuinely not hear a whistle that is obvious to everyone else. Trust what the family hears and get it looked at.
Does whistling mean my parent needs a new hearing aid?
Usually not. Most persistent feedback is solved with a fresh ear mould, new tubing, or re-tuning the aid's feedback settings. A remould costs a small fraction of a new device — call +91 9429690093 for an exact quote for your parent's model.
How much does a remould or new tubing cost?
Both cost far less than a new hearing aid, and hearing aids in India are GST-exempt. Exact prices depend on the mould type and model, so we give an honest quote after the check rather than a guess — and offer up to 30–50% off MRP and 0% EMI where a new aid is genuinely needed.
Do you come home to check the fit and feedback?
Yes. Home visits are available across Pune, Delhi and Bengaluru, so your parent can be seen in their own chair. The visit includes a free 45-minute check of the ears, mould, tubing and settings, with free lifetime programming on aids fitted with us.
Stop the whistle — book a free fit & feedback check
Whistling is fixable, and you do not have to figure it out alone. Book a free 45-minute hearing and feedback check with an RCI-registered audiologist at our Pune, Delhi or Bengaluru clinic — or choose a home visit in any of the three cities so your parent is seen in their own chair. Call or WhatsApp +91 9429690093 to arrange a time.
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