How do hearing aids work?
Brains On! Science podcast for kids
Brains on - Swan Jun's Mystery Sound
Swan Jun: The answer is the feedback from my hearing aid and like turning it on. It happens when the ear mold is not fitting tightly in my ear or I know I need to just peel it back in there. Is that a sound that you find irritating? You don't think anything of it because you hear it all the time.
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