As an auditory organ, human ear has two functions, one is auditory function, the other is position balance function.
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Among them, hearing is a behavioral response to sound. It is a long and complex neurobiological process from receiving sound by physical stimulation to psychological perception, even behavioral response. The complexity and precision of hearing organ make the most complex mechanical and electronic equipment in the world look out for dust.
At present, there are many artificial hearing devices on the market, mainly hearing aids, artificial ossicles, artificial cochlea, vibration Jinghao, BAHA, etc., which are rehabilitation products to assist in improving hearing.
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We see that many deaf patients who use hearing aids get a lot of help, from silence to sound, but still can’t be like normal people. Many people who use hearing aids are not satisfied, even complain about these devices.
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The principle of hearing aids is to amplify the sound coming into the human ear. These amplified sounds stimulate the cochlear hair cells located in the inner ear through the hearing aids placed in the outer ear canal and through the middle ear, so as to improve the neural discharge rate and generate the auditory perception. This requires that the amplified sound of hearing aids must match the status of the cochlear hair cells, that is, “hearing aid matching”.
There are two aspects in hearing aid fitting:
First, understand the patient’s medical history, then pure tone audiometry and speech audiometry to understand the severity and damage mechanism of hearing loss;
The second is the selection, verification and evaluation of hearing aids, and the most important is the fine parameter setting. The parameter setting of hearing aids directly affects the user’s recognition of sound and the satisfaction of hearing scene. Most hearing aids have the best effect in less people or quiet environment.
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At present, with the development of AI technology, more and more hearing aid manufacturers begin to introduce hearing aid intelligent fitting, which is more precise, more accurate, less time-consuming and better user experience.
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Hearing aids must rely on the residual hearing of patients to produce auditory perception. Unlike ears, hearing aids use very few auditory scenes, which can not be compared with the extensive application of ears. Therefore, the structure of human ears is excellent, and the protection of hearing is the fundamental. Regular hearing examination should be carried out. When hearing damage occurs, help should be sought in time to prevent it.
Link：Deafness and hearing aids
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