Basically, most of the elderly suffer from hearing loss, which is commonly known as deafness. Hearing loss can be divided into four categories: mild, moderate, severe and extremely severe.
In general, it is unnecessary to wear hearing aids for mild hearing loss. The hearing loss of normal people is from 0 to 25 decibels, while that of mild people is from 25 to 40 decibels. In fact, the hearing loss in this stage is not serious.
Theoretically speaking, hearing loss of more than 40 decibels is enough to start wearing hearing aids.
When the elderly suffer from deafness, it is better to wear hearing aids as early as possible, which can be used to compensate our hearing and protect our residual hearing, so as to avoid further loss of hearing.
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Link：Is it necessary to wear hearing aids when the old are deaf
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