Why do Hearing Aids Sometimes Whistle?

If your hearing aid suddenly starts making a high-pitched whistling sound, it's easy to think something has gone wrong.

Fortunately, that's rarely the case. In most situations, hearing aid whistling, known as feedback, is a common issue that can usually be corrected quickly during an appointment.

What Causes Hearing Aid Feedback?

Feedback happens when amplified sound escapes from your ear and is picked up again by the hearing aid's microphone. This creates the familiar whistling or squealing noise.

Modern hearing aids include advanced feedback management systems, but certain situations can still cause it to occur.

Common Reasons Your Hearing Aid May Whistle

Several everyday factors can trigger feedback, including:

• Earwax partially blocking the ear canal.

• A hearing aid that isn't sitting securely in your ear.

• Changes in the shape of your ear over time.

• A dome or earmould that no longer fits properly.

• Needing a programming adjustment.

Most of these issues are simple to identify and resolve.

Don't Ignore Persistent Feedback

Occasional whistling while inserting your hearing aids is often perfectly normal.

However, if your hearing aids whistle regularly throughout the day, it's worth scheduling a check-up. Your audiologist can inspect your ears, clean the devices if necessary, assess the fit, and make any programming adjustments needed to restore comfortable performance.

Regular Maintenance Helps Prevent Problems

Keeping your hearing aids clean and attending routine follow-up appointments helps reduce the likelihood of ongoing feedback.

Professional servicing also ensures your devices continue performing as intended and allows small issues to be addressed before they become bigger problems.

Conclusion

Most hearing aid whistling is caused by feedback rather than a faulty device. Whether it's earwax, fit, or a simple adjustment, the problem can often be resolved quickly. If your hearing aids have started whistling regularly, a visit to your audiologist can usually have them performing comfortably again.