As an audiologist running Applied Hearing Solutions in Phoenix, Arizona, I see patients every day who are frustrated by their whistling hearing aids. That annoying sound can be embarrassing, especially in quiet places like church services or medical offices.

Understanding Hearing Aid Feedback: Why Your Devices Whistle and How to Stop It

The whistling sound, which we call feedback, happens when amplified sound from your hearing aid's speaker (receiver) gets picked up again by the device's microphones, creating an endless loop. Think of it like putting a microphone too close to a speaker at a concert - you get that same squealing noise.

Modern hearing aids are incredibly small, which puts the speaker and microphones very close together. This compact design, while great for aesthetics and comfort, does increase the risk of feedback.

But here's the good news: We can almost always eliminate this whistling once we understand what's causing it.

Different Hearing Aid Styles and Feedback Risk

Many people assume their hearing aids are whistling because they're dirty. They clean the domes, change wax traps, clear the vents, and brush the microphones - yet the whistling persists. When hearing aids amplify sound in your ear canal, your eardrum vibrates more intensely. If the dome doesn't create a proper seal, that amplified sound can leak out and get picked up by the hearing aid's microphones - causing feedback. This is particularly common with open domes, which have larger ventilation holes than vented or power domes. The more open space in the dome, the more sound can escape and create that whistling effect.

Let's break down how feedback affects different hearing aid styles:

• Receiver in Canal Aids: Most common type today, using rubber domes. These can be more prone to feedback if not properly fitted.
• Custom Molded In-Ear Devices: Made specifically for your ear shape, reducing feedback risk when properly made.
• Behind the Ear Aids: Use custom molds or tubes, each with their own feedback considerations.
• Lyric Extended: Wear Deep placement in the canal typically minimizes feedback issues.

Situations That Often Trigger Feedback

Most of my patients wear receiver-in-canal devices with rubber domes. When these hearing aids amplify sound in your ear canal, your eardrum vibrates more intensely. If the dome doesn't create a proper seal, that amplified sound can leak out and get picked up by the hearing aid's microphones - causing feedback.

This is particularly common with open domes, which have larger ventilation holes than vented or power domes. The more open space in the dome, the more sound can escape and create that whistling effect.

Understanding this helps explain why feedback often starts when:

• Your hearing aid shifts position slightly
• You hug someone or put a phone to your ear
• You're chewing or talking
• Your ear canal shape changes as you age

Solutions for Stopping the Whistle

If you're struggling with whistling hearing aids, talk with your audiologist. They can evaluate the fit and determine the best approach to stop the feedback. With proper fitting and maintenance, you can enjoy your hearing aids without those embarrassing whistles interrupting your day.

The solution varies depending on your specific situation, but might include:

Dome Adjustments

Switching from an open dome to a more closed style can often reduce feedback. Your audiologist can help select the right option.

Custom Ear Molds

If domes aren't working well, custom molds provide a more precise fit and better seal.

Programming Changes

Sometimes the hearing aid settings need adjustment to prevent feedback while maintaining good sound quality.

Tips for Feedback-Free Hearing

Regular Maintenance

Keep your devices clean and well-maintained:

• Change wax guards regularly
• Clean domes daily
• Have your ears checked for wax buildup
• Schedule regular professional cleanings

See Your Audiologist

Book an appointment if:

• Feedback is new or getting worse
• Your current solutions aren't working
• It's been more than 6 months since your last checkup
• You notice changes in how your hearing aids fit

Want more hearing health tips and advice? Check out my YouTube channel, Doctor Cliff AuD, where I post new videos every week to help you hear your best. From troubleshooting common problems to reviewing the latest hearing technology, we cover everything you need to know about better hearing.