After wearing the hearing aid, even if it is not turned on, some people will feel that they have an echo when talking, which is like talking in a barrel.
This is due to the vibration of the cartilage of the external auditory canal caused by the conduction of the voice through the middle ear and skull after the external auditory canal is closed by the ear mold (including the shell of the customized hearing aid).
In general, if the earplug of the hearing aid is open type, the sound energy is released, which is not easy to be detected. But when the external auditory canal is closed by earplugs, this part of the energy is left in the external auditory canal, which will produce echo.
Of course, we can also understand it from another perspective:
We always feel “strange” to the voice we speak from the recorder or mobile phone, but others don’t.
Why? Because under normal circumstances, we listen to ourselves: there are “air guides” that come out of the mouth and pass through the outer ear to the inner ear, and there are “bone guides” that directly pass through the skull vibration to the inner ear.
When listening to the recorder, we can only hear the “air guide”, but not the “bone guide”.
Under normal circumstances, “air conduction” and “bone conduction” are balanced, and we are used to it. But with the hearing aid on, the bone guide suddenly strengthens, and it sounds like an echo.
Jinghao hearing aid reminder: hearing aid wearing requires professional “matching”, so it is very important to choose a professional hearing aid matching center and a hearing aid tester! If you have any hearing problems, you can call Jinghao for consultation, or come to the matching center for experience. Hearing aid free consultation Tel.: + 86-18566295705
Link:What's wrong with hearing aids
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