Hearing aids belong to the medical equipment, so it must be through the examination and fitting.
Hearing aids are like a bad eye, the first thing you need to do is to check the light. The first thing to determine is whether the person is nearsighted or farsighted, with or without astigmatism, and so on, which has a bearing on whether the glasses can see clearly, or whether they are simply not suitable for wearing glasses.
Hearing aid fitting is also the need to first ask the medical history, there is no otitis media, mastoidectomy, tinnitus and other aspects of the medical history, but also to ask the general medical history, especially the elderly have high blood pressure, diabetes, kidney disease, cervical spine disease and so on is also related to the selection of a suitable hearing aid.
Then check the hearing situation: the elderly must do a pure tone audiometry to know how much hearing, what nature of hearing loss.
The most critical thing is to have the old man himself to try the hearing. Hearing aids due to many brands, prices, the dispenser can only introduce you to the appropriate power of the hearing aid, only audition, do a good with the hearing aid after the assessment, in order to better help the elderly.
A good hearing aid, but also to teach the elderly to wear their own, replace the battery, usual maintenance and so on.
Only the old man himself accepted, so as not to spend money on the younger generation ah, huh. (We encountered a lot of juniors specially from abroad to buy hearing aids filial piety to the elderly, the elderly at first novelty, but due to hearing is not clear, will not use, bad nowhere to repair and so on a lot of problems on the shelves).