Why Your Hearing Aid Whistles, and How to Stop It
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.