What is the function of this sensing device? I don't quite understand it.

Because I was wrong from the beginning, the following work became useless.

This is useless and does not rely on bone conduction. The biggest problem for hearing-impaired people is actually their language recognition ability. The real sense of stigma is the inferiority complex caused by communication disorders. Sound quality restoration is the key to hearing aid equipment. If hearing can be restored to a greater extent and more accurately, even a helmet will be required. This kind of product is not to see the appearance, but the internal technology, the elderly usually choose more ear type hearing aid rather than ear type (hidden), because the ear type although good-looking, but the compression of the product internal space, at the expense of functionality and volume, usually the major brands of ear type hearing aid is not high power, this is the reason.

so strong

Different from others

the appearance is OK

It's not easy

nice