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Hearing aids are designed to amplify sound, but sometimes the amplified sound leaks back into the microphone, creating a high-pitched whistling or squealing noise. This is called feedback.

In most cases, feedback is easy to fix with proper fitting, cleaning, or adjusting the device. Modern digital and AI hearing aids from brands like Signia, Phonak, Widex, and ReSound come with advanced anti-feedback technology—but users may still experience whistling due to external factors.

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Common Reasons Why Hearing Aids Whistle

1. Poor Fitting of the Hearing Aid

• Loose fitting causes sound leakage
• Common with CIC/ITC models when not snug
• Ear shape changes over time, causing gaps

2. Earwax Build-Up

• Wax blocks sound → causes echo effect
• Makes hearing aid amplify sound unnecessarily

3. High Volume or Excess Amplification

• Too loud setting makes sound bounce back
• Common in severe hearing loss users

4. Damaged Tubing or Dome

• Cracks, loose domes, or worn parts lead to leakage

5. Microphone & Receiver Too Close

• Happens when covering the ear with hand, scarf, or phone

6. Wrong Ear Tip Size

• Smaller domes lead to loose seal → whistling

7. Internal Device Issues

• Faulty microphone/receiver
• Moisture damage
• Hardware malfunction

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How to Stop Hearing Aid Whistling (Quick Fixes)

1. Refit or Tighten the Hearing Aid

• Ask your audiologist to check ear fitting
• Try a larger dome size
• Custom earmold if needed

2. Clean Earwax

• Visit clinic for wax removal
• Regular cleaning prevents blockage

3. Reduce the Volume Slightly

• Lower volume by 1–2 levels
• Let AI system auto-adjust

4. Replace Dome, Wax Guard, or Tubing

• Change dome weekly or bi-weekly
• Replace wax guards monthly
• Replace tubing every 3 months

5. Avoid Covering the Ear

• Do not press hearing aid with helmet, scarf, or phone
• Use Bluetooth streaming instead of phone-in-ear

6. Update Hearing Aid Software

• AI models update noise cancellation through apps

7. Switch to Advanced Anti-Feedback Models

Latest premium models like:

• Signia Pure Charge&Go IX
• Phonak Lumity
• Widex Moment Sheer
• Oticon Intent

offer real-time feedback cancellation.

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Comparison: Old vs New Anti-Feedback Technology

Feature	Older Digital Hearing Aids	Latest AI Hearing Aids (2026)
Feedback Control	Basic	Advanced AI-based
Whistling Reduction	50–60%	90–95%
Auto Seal Detection	❌	✅
Real-time Sound Analysis	❌	✅
Suitable for High Power Loss	Limited	Excellent
Comfort	Moderate	High (custom adaptive fitting)

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When to Visit a Hearing Specialist

Seek expert help if:

• Whistling continues even after cleaning
• Device becomes uncomfortable
• Suddenly increases in feedback
• You use high-power hearing aids

An audiologist can run:

• Feedback test
• Ear canal inspection
• Fitting recalibration

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Preventive Tips to Avoid Whistling

• Keep ears clean
• Keep hearing aid dry
• Ensure proper insertion every time
• Use correct dome size
• Get regular servicing every 6 months

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FAQs – Hearing Aid Whistling / Feedback Issue

1. Is hearing aid whistling normal?

Occasional whistling may happen, but persistent feedback is not normal and needs correction.

2. Do AI hearing aids reduce feedback?

Yes. AI hearing aids from Signia, Phonak, Oticon, and Widex offer advanced anti-feedback systems.

3. Why does my hearing aid whistle when I touch my ear?

Because the microphone gets covered, sound bounces back and creates feedback.

4. Does earwax cause whistling?

Yes. Earwax is one of the top causes of feedback.

5. Should I clean hearing aids daily?

Yes—wipe daily, replace domes monthly, wax guards monthly.

6. Do custom earmolds stop feedback?

Custom molds provide a tighter seal and reduce whistling significantly.

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