Basic knowledge of choosing a hearing aid-OTC...
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A hearing aid is an audio amplifier that amplifies and adjusts the sound to maximize the residual hearing of the hearing impaired and compensates the hearing impaired for hearing or otherwise inaudible.
The choice of hearing aids must not be taken lightly. Because there are many types of hearing aids, the hearing impaired must choose a suitable hearing aid through ear, hearing test and test under the guidance of a professional.Here is a brief introduction to the classification of...
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