On the Internet, in wechat and QQ groups, many users reported that they could hear the sound after wearing hearing aids, but could not hear clearly. Let’s talk about it today.
Why can’t I hear you clearly
Human hearing consists of two stages: hearing (perception) and hearing (understanding). Hearing is the physiological function of the auditory system, while hearing is the advanced function, including auditory recognition, auditory memory, auditory understanding, etc. As long as there is sound signal to the hearing center, we will “hear”; but to hear clearly, we must also have the ability of hearing discrimination. So if you can hear it clearly, you must hear it, but you can’t hear it clearly.
Inner ear and auditory center
The inner ear has a simple ability to distinguish sound signals. When the inner ear is damaged, the ability to distinguish hearing will decrease. But because there is enough room for human auditory resolution, 70% of speech recognition is enough to ensure our understanding, rather than demanding 100%. Therefore, the less serious inner ear injury will not make the patients lose their auditory resolution completely.
The auditory center has a more complex and powerful ability to distinguish sound signals. The auditory center is damaged, and the ability of auditory recognition will be significantly reduced. When people enter the noisy environment, because the speech signal itself becomes unclear, the normal hearing people also sound more difficult, and the patients with hearing loss can’t hear clearly. If the signal is too low, a similar situation will occur. For example, if the TV is too low, we can’t hear it clearly. Unfortunately, most of the patients with sensorineural deafness have damage to the inner ear and auditory center, but to different degrees, and the more serious the hearing loss is, the worse the discrimination ability is, except for the auditory neuropathy. Therefore, most patients with sensorineural deafness will complain that they can hear but can’t hear clearly.
Recognition ability of the elderly
Compared with the young people with the same degree of hearing loss, the recognition ability of the old people is worse, and the phenomenon of hearing loss is more common. Hearing aids can only solve the problem of hearing. A small number of all digital advanced hearing aids can help a part of the problem of hearing. Unfortunately, there is no 100% hearing solution in the world to solve the problem of hearing.
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Link：You can't hear what you see when you wear a hearing aid
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