"Matching" refers to the selection of hearing aids suitable for their own listening under the guidance of professional and technical personnel. Like glasses, hearing aids are another kind of physiological function aids that need "matching". Hearing aids purchased and used without professional examination and examination are not only difficult to play the hearing aid effect, but also may damage the residual hearing of users, which lead to "more wear and deafness".

First, because of the different hearing loss of each person, different types of hearing loss, degree of damage, whether there is tinnitus, revitalization, hearing discrimination, etc., all lead to different hearing differences. Even if it is hearing impairment with the same nature and degree, everyone's requirements and feelings may be different. These differences are often related to living habits, working environment, subjective tolerance, etc., so different people have different requirements for hearing aids. Secondly, hearing aids have many brands and models. For users, it is a professional problem that can not be solved by themselves, and can only be selected and recommended by professionals. Only when the hearing condition and the demand of the user are in good agreement with the performance of the selected hearing aids, the best hearing aid effect can be achieved.