Hearing impaired people need to choose hearing AIDS to improve their hearing, but hearing AIDS can't be used casually. When choosing a hearing aid, you should pay attention to the following points: the hearing aid is "matched", not "bought" from the store. Fitting hearing AIDS is a scientific and precise process, just like fitting glasses requires optometry. Before fitting, we should ask about the medical history, then conduct a comprehensive hearing test and evaluation, and draw an audiogram. Then the doctor put the selected hearing aid into the hearing aid detector and passed more than a dozen tests to see if its performance reached the standard. Finally, try it on for a period of time according to each person's unique ear structure. If you feel uncomfortable subjectively, the fitter will repeatedly adjust the various wire control devices of the hearing aid to achieve the best effect. No two hearing disorders are exactly the same, so you must choose the hearing aid that really suits you according to your unique hearing loss.