Many hearing aid users report hearing mobile phone calls clearly but struggling to hear surrounding sounds. If this sounds familiar, you’re not alone—and there’s a reason why. This issue usually stems from how hearing aids process sound through different input sources. Let’s explore the most common causes and what you can do to resolve the issue and restore full hearing aid function.
Why Can You Hear Phone Calls but Not External Sounds?
Modern hearing aids handle sound from two primary sources:
- Direct Streaming from Phones – This transmits audio directly to your hearing aids, bypassing external microphones. If calls sound clear, it confirms the internal speaker is functioning.
- Microphone Input for Environmental Sounds – If voices or ambient noise are hard to hear, the issue likely lies with the microphones that pick up sound from your surroundings.
Common Causes and Solutions
1. Blocked Microphone Ports
Over time, earwax, dust, and skin debris can clog your hearing aid microphones, drastically reducing sound pickup. Streaming remains unaffected because it bypasses the microphone entirely.
What to Do:
- Gently clean the microphone ports using a hearing aid brush or a soft toothbrush.
- Never use water or alcohol-based cleaners—they may cause permanent damage.
- Incorporate microphone cleaning into your daily routine.
2. Hearing Aids Need Professional Cleaning
Some debris is too deep or sticky to be cleaned at home. In this case, a professional cleaning at your audiologist’s office is necessary. They use suction tools, microscopes, and other precise instruments to fully restore functionality.
3. Internal Damage or Component Failure
If cleaning doesn’t help, the microphone component may be malfunctioning. Hearing aids are complex electronic devices, and parts can degrade or fail with age or moisture exposure.
What to Do:
- Bring your devices to a professional for diagnostic testing.
- If under warranty, the manufacturer may offer a free or low-cost repair.
- In some cases, repair costs may be better invested into new technology.
Preventative Maintenance Tips
- Clean hearing aids daily with a brush and inspect the microphone area for debris.
- Use a drying system or dehumidifier to remove moisture and extend component life.
- Schedule regular checkups to catch and correct performance issues early.
- Read more: Why hearing aids must be programmed properly.
By keeping your hearing aids clean and well-maintained, you can enjoy clear audio from both your phone and the world around you. If you’re still struggling, contact your audiologist for troubleshooting or a possible upgrade.