There is echo after wearing hearing aid

After putting on the hearing aid, even if the switch 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). Normally (without hearing aid) the external auditory canal is open, and this vibration energy is released without being detected. When the external auditory canal is closed by the ear mold, this part of the energy is left in the external auditory canal, resulting in the above phenomenon. This is also the case in normal people when they block the ear canal with fingers or other things. In medicine, this phenomenon is called “ear blocking effect”.

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It can also be explained from another angle: we always feel “strange” to the voice of our own voice coming from the recorder, but others don’t feel it. Why? Because under normal circumstances, when we listen to ourselves, there are not only “air conduction” elements that come out from the mouth and pass through the outer ear to the inner ear, but also “bone conduction” elements that directly pass through the skull vibration to the inner ear. When listening to the recording, we can only hear the “air conduction” component, but not the “bone conduction” component. Under normal circumstances, the components of air conduction and bone conduction are in balance, which we are used to. If you wear a hearing aid, the “bone guide” component suddenly strengthens, and it will sound like an echo.

This is more obvious in customized hearing aids. Generally, we make ventilation holes on customized machines to solve this problem, but sometimes we need to pay enough attention to the ear blocking effect which is more serious in the selection of appearance.

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