Why do ear-bearing hearing aids have eardrums?

One is to fix the hearing aid, the other is to transmit the amplified sound of the hearing aid into the ear, and to transmit the sound. The third is to change the acoustic parameters of the hearing aid through the length of the ear mold and the size of the sound hole to achieve the best. The hearing compensation effect of the ear-back hearing aid must be configured with the eardrum. The eardrum has the effect of making the hearing aid wear stable to improve the acoustic effect of the hearing aid and prevent the hearing aid from whistling. The experiment proves that the eardrum can not be ignored in the hearing compensation effect for the deaf children.8As the age of the deaf children grows, the eardrum material is soft and hard, and there are many different types.

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The ear mold mainly has three functions, one is to fix the hearing aid, the other is to transmit the amplified sound of the hearing aid into the ear, and to transmit the sound. The third is to change the length of the ear tube and the size of the sound hole to change the hearing aid. Acoustic parameters for optimal hearing compensation.

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