Hearing Aid Whistling? How to Stop Feedback Noise

That annoying whistling sound from your hearing aid is called acoustic feedback, and it is one of the most common complaints among hearing aid users. The good news is that feedback is almost always fixable, and modern hearing aids like Signia have built-in technology to prevent it from happening in the first place.

Understanding why your hearing aid whistles is the first step toward solving the problem. Feedback occurs when amplified sound leaks out of your ear canal and gets picked up by the hearing aid's microphone, creating a loop that produces a whistle or squeal.

Common Causes of Hearing Aid Whistling

Poor Fit or Loose Ear Mold

The most common cause of feedback is a hearing aid that does not fit snugly in your ear. If there are gaps between the ear mold and your ear canal, amplified sound escapes and re-enters the microphone. This can happen because your ear canal shape changes over time due to weight loss, aging, or jaw movement. A visit to your audiologist for a new ear impression usually solves this problem.

Earwax Buildup

When earwax accumulates in your ear canal or blocks the hearing aid's sound outlet, sound bounces back toward the microphone instead of traveling into your ear. Regular cleaning of both your ears and your hearing aid prevents this issue. If you have excessive earwax, ask your doctor about safe removal methods before using your hearing aid.

Damaged Tubing or Domes

Cracked, hardened, or loose tubing on BTE hearing aids can cause sound leakage. Similarly, worn-out domes on RIC hearing aids may not seal the ear canal properly. Tubing should be replaced every 3-6 months, and domes should be changed every 1-3 months.

Volume Set Too High

If your hearing aid volume is set higher than needed, the excess amplification is more likely to leak out and cause feedback. If you find yourself constantly turning up the volume, your hearing may have changed and you need a new audiogram and reprogramming rather than just higher volume.

How Signia Prevents Feedback

Signia hearing aids feature advanced feedback cancellation technology that actively monitors for feedback loops and eliminates them in real time. This system works by detecting the feedback signal before it becomes audible and generating an anti-phase signal to cancel it out.

Key features of Signia's feedback management include:

• Real-Time Feedback Cancellation: The processor continuously scans for feedback patterns and neutralizes them instantly.
• Frequency Shifting: Slight frequency adjustments prevent the feedback loop from establishing itself.
• Gain Management: Automatic gain reduction in feedback-prone frequencies prevents whistling without affecting overall sound quality.
• Notch Filtering: Targeted filtering removes only the specific frequencies causing feedback, preserving natural sound.

DIY Troubleshooting Steps

Before visiting your audiologist, try these simple fixes at home:

• Remove and Reinsert: Take out your hearing aid and carefully reinsert it, ensuring a snug fit in your ear canal.
• Clean the Device: Use a soft brush or cloth to clean the microphone ports and sound outlet. Remove any visible earwax.
• Check the Dome or Mold: Make sure the dome or ear mold is properly attached and not cracked or worn.
• Lower Volume: Reduce the volume by one or two steps and see if the whistling stops.
• Avoid Covering Your Ear: Holding a phone close to your ear or wearing a hat can redirect sound back to the microphone. Adjust positioning accordingly.

Preventing Feedback Long-Term

Regular maintenance is the best way to prevent feedback problems. Schedule check-ups every 3-6 months with your audiologist. Keep your hearing aid clean and dry. Replace domes and tubing on schedule. If your hearing changes, get a new audiogram and have your hearing aid reprogrammed accordingly.

Modern Signia hearing aids with advanced feedback cancellation have made whistling problems much less common than they were with older devices. If you are using an older hearing aid that constantly whistles, upgrading to a newer model may solve the problem entirely.