Explanation of hearing aids?

It is an assistive device used by hearing-impaired people to supplement the deficiencies caused by hearing damage. Hearing aids are tools, equipment, devices, and instruments that improve the ability to converse and communicate with others. Broadly speaking, where the sound can be effectively transmitted to the ear of the various devices can be viewed as a hearing aid, narrowly speaking, a hearing aid is an electroacoustic amplifier, through which the sound will be amplified so that the deaf people hear the original hearing is not clear, can not hear the sound, this device is a hearing aid. Currently, hearing aids are mainly divided into analog hearing aids and digital hearing aids. Analog hearing aids amplify sound uniformly regardless of the shape of the patient's hearing loss curve, while digital hearing aids accurately compensate for the shape of the patient's hearing loss curve. Hearing aids can be categorized into behind-the-ear hearing aids, in-the-ear hearing aids, canal hearing aids, complete canal hearing aids, and 100% invisible hearing aids from the point of view of wearing position and shape.