Previously, a common complaint among hearing aid users was the presence of feedback, or high-pitched whistling noises. This issue could occur during conversations, when hugging someone or even while wearing a hat.
Nearly 28.8 million Americans could benefit from using hearing aids. For those people, most hearing aids are now equipped with feedback cancellation systems that significantly reduce or eliminate this problem.
About Hearing Aid Feedback
Feedback occurs when amplified sound from the hearing aid’s speaker escapes the ear canal and re-enters the microphone. This creates a sound loop that leads to a high-pitched squeal or whistle. Several factors can trigger feedback, including poor fit, physical contact, certain settings and even earwax impaction.
How Feedback Cancellation Works
Now, hearing aids use digital processing to detect and eliminate feedback before it becomes audible. These systems analyze the input signal and compare it to known patterns of feedback. When a match is detected, the device generates an inverse sound wave to cancel out the whistling noise.
Key elements of feedback cancellation include:
- Real-time monitoring of sound loops
- Technology to neutralize feedback
- AI adjustments to respond to changing environments
- Algorithms that improve performance over time
This feature operates automatically in most devices, allowing wearers to go about their day without constant adjustments or interruptions.
Benefits of Feedback Cancellation
The integration of feedback cancellation has improved the overall user experience for hearing aid wearers in many ways.
Notable benefits include:
- Greater comfort during phone calls or close interactions
- Fewer volume restrictions, allowing for clearer amplification
- More confidence in social situations like friendly lunches at Ocean Café
- Improved sound quality without interference
- A better fit with accessories like glasses, hats or masks
This technology supports more natural hearing and helps users feel less self-conscious about their devices.
What Users Should Know
While feedback cancellation has greatly reduced the occurrence of unwanted noise, it’s still important to ensure the hearing aid is properly fitted and maintained. A poorly fitting device can cause irritation and may not function properly.
To optimize hearing aid performance:
- Schedule regular checkups for adjustments and cleanings
- Replace domes, tubes or earmolds when they become worn
- Keep ear canals clean and free of wax buildup
- Report any persistent feedback to your hearing specialist
To learn more about the benefits of hearing aids or to schedule a hearing test for you or a loved one, contact San Francisco Audiology today.