Franklin, Tenn. – October 30, 2026 -- A whistling hearing aid is usually not broken. According to a HelloNation article featuring Franklin audiologist Dr. Elizabeth Welch, the noise typically traces back to fit, earwax or settings that a clinic can fix.
Feedback happens when amplified sound leaks back into the microphone
Whistling, also called feedback, occurs when amplified sound escapes the ear canal and loops back into the device's microphone. The result is a sharp whistle or other distorted noise.
Poor fit is a leading cause of whistling
A hearing aid that does not sit securely lets sound escape. The shape of the ear canal can change with aging, weight fluctuations or ear infections, which makes leaks more likely. Custom earmolds and regular professional adjustments keep the fit snug and improve sound clarity.
Earwax and loud settings also trigger distortion
Wax buildup can interfere with sound transmission and create pressure that affects performance, causing intermittent whistling or muffled sound. Devices set too loudly, or programmed incorrectly for a given environment, are more prone to feedback.
Many modern hearing aids include adaptive feedback cancellation. The article notes that it works best when paired with a proper fit and routine adjustments.
Franklin clinics check fit, wax and programming
Audiology centers and ENT clinics in Franklin examine device fit, look for earwax blockages and check programming levels. Small changes to volume, frequency response or mold design can often eliminate feedback quickly. If problems persist, clinicians may recommend new components or more advanced features.
Routine care helps prevent repeat problems
The article advises users to clean microphones and receivers regularly, check battery levels, monitor changes in ear anatomy and store devices correctly. Local professionals can offer personalized care tips and schedule regular checkups.