Hearing aid whistling is usually feedback: amplified sound leaks out, reaches the microphone again, and gets re-amplified.
Common causes
- The device is not seated fully.
- Ear tips or domes do not fit well.
- Volume or gain is too high for the current fit.
- Earwax or debris blocks the sound outlet.
- A hand, hat, or phone is too close to the microphone area.
Easy checks
Reinsert the device, lower volume slightly, clean the sound outlet, and confirm the ear tip size. If whistling continues, contact support for fit guidance.
When to get help
If feedback appears with discomfort, sudden hearing change, ear pain, drainage, or dizziness, seek professional advice instead of only adjusting the device.