If you wear hearing aids, you might be familiar with that frustrating whistling or feedback noise that sometimes occurs. While this sound is often temporary, it can be disruptive and distracting. But what causes it? And more importantly, how can you eliminate or reduce it?
In this blog, we will explore five common reasons why hearing aids produce feedback noise, and why CIC (Completely in Canal) hearing aids are more susceptible to this issue. We'll also provide solutions to troubleshoot and fix the feedback, ensuring your hearing aids work smoothly.
What is Feedback Noise in Hearing Aids?
Feedback noise in hearing aids is a high-pitched sound, often likened to whistling or squealing. That is typically caused by sound leaking from the hearing aid and re-entering the microphone. This loop of sound is what results in feedback.
CIC hearing aids, due to their small size and placement deep in the ear canal, are more vulnerable to feedback noise compared to larger hearing aid models. Understanding why feedback occurs can help you address the issue effectively.
5 Reasons Why Hearing Aids Produce Feedback Noise
1. Improper Fit or Seal
One of the most common causes of feedback is an improper fit or seal. If the earmold or the device itself does not sit properly in the ear, sound may escape and loop back into the microphone.
Solution:
- Ensure a proper fit: Work with your audiologist to get the right size and fit for your hearing aids. If the earmold or dome is too large or too small, it may not create a good seal, leading to sound leakage.
- Adjust the ear tip or earmold: Make sure the ear tip or earmold fits comfortably but securely within the ear canal.
2. Accumulation of Earwax or Debris
Earwax is another culprit that can interfere with the performance of hearing aids. If earwax builds up in the ear canal or on the hearing aid itself, it can disrupt the device's sound transmission.
Solution:
- Regular cleaning: Keep both your ears and hearing aids clean. Use a soft, dry cloth to wipe down the hearing aid and remove any earwax from the microphone or speaker.
- Visit your audiologist: If you are experiencing frequent buildup, consult an audiologist for ear cleaning and device maintenance.
3. Incorrect Volume Settings
Hearing aids set to a high volume are more likely to cause feedback, especially in smaller devices like CIC hearing aids. When the volume is too loud, the sound may bounce back into the microphone, triggering feedback.
Solution:
- Adjust the volume: Lower the volume on your hearing aids or use a smartphone app (if compatible) to fine-tune the settings.
- Automatic volume control: Many modern hearing aids come with automatic volume control features that adjust the volume based on the environment.
4. Proximity of the Hearing Aid to Objects
Sometimes, feedback is triggered when the hearing aid is too close to objects like pillows, scarves, or hats. These objects can obstruct the microphone or reflect sound, leading to whistling noises.
Solution:
- Keep your hearing aid away from fabrics or objects: Be mindful of where you place your hearing aid, especially if you wear hats or scarves that might create a barrier.
- Store your hearing aids properly: Use the protective case to store them when not in use.
5. Faulty or Damaged Hearing Aids
Hearing aids can also produce feedback noise if there is an issue with the components, such as the microphone or amplifier. Damaged parts can create unintended loops of sound that result in whistling.
Solution:
- Check for damage: Regularly inspect your hearing aids for visible damage. If you notice any issues, take them to an audiologist or hearing aid provider for inspection and repair.
- Replace faulty components: If the device is old or damaged beyond repair, it may be time to replace it with a new model.
Why Are CIC Hearing Aids More Susceptible to Feedback?
CIC (Completely in Canal) hearing aids are the smallest hearing aid models available and sit deep in the ear canal. However, their small size and deep placement increase the likelihood of feedback because:
- Proximity to the ear drum: The microphone and speaker are very close to the eardrum, which increases the chance of sound leaking back into the microphone.
- Tight ear canals: In cases where the ear canal is smaller or shaped irregularly, feedback is more likely to occur in CIC models.
While CIC hearing aids provide excellent sound clarity and are discreet, users with small ear canals or those who experience frequent feedback may need to explore larger models with more robust sound channels and better seals.
How to Fix Feedback in CIC Hearing Aids
Here are some tips specifically for CIC hearing aid users to reduce or eliminate feedback:
- Work with your audiologist to adjust the fit and seal of your hearing aid. A good fit is essential to prevent sound leakage.
- Ensure your hearing aids are clean and free from earwax. Regular cleaning can help prevent feedback.
- Adjust the volume settings. Decreasing the volume can often reduce feedback, especially if you don’t require the loudest setting.
- Consider switching to a larger hearing aid model if the problem persists and you continue to experience feedback regularly.
Conclusion
While hearing aid feedback can be frustrating, understanding its causes and how to troubleshoot the issue can help you enjoy clearer sound and better hearing.
By maintaining a proper fit, adjusting volume settings, and keeping your hearing aids clean, you can significantly reduce or eliminate feedback noise.
CIC hearing aids are particularly susceptible to feedback, so it’s important to ensure the device fits properly and is maintained regularly.
For those experiencing persistent feedback or issues with their current hearing aids, consulting with a professional audiologist is recommended. They can help determine whether a different type of hearing aid or adjustments are needed.
FAQ
Q1: Why do my hearing aids whistle?
Hearing aids may whistle due to improper fit, earwax buildup, high volume settings, or interference from external objects. Regular cleaning and adjustments can help.
Q2: How can I stop hearing aid feedback?
Ensure your hearing aids fit well, clean them regularly, and adjust volume settings. If feedback persists, consult an audiologist for a proper assessment.
Q3: Are CIC hearing aids more prone to feedback?
Yes, due to their deep placement in the ear canal, CIC hearing aids are more susceptible to feedback compared to larger models.
