How does hearing loss affect language development?

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The degree of hearing loss is also called deafness or hearing level. It is the number of decibels by which the human ear's hearing threshold at a certain frequency is higher than the normal hearing threshold. Hearing loss caused by age is called presbycusis; hearing loss caused by social environmental noise (except for the effects of age, occupational noise and disease) is called social deafness; hearing loss caused by occupational noise is called noise-induced hearing loss deaf.

Generally, hearing tests can be performed in hospitals or professional hearing aid fitting centers. A hearing test can accurately measure the degree of hearing loss.

How does hearing loss affect language development?

If you have been deaf since childhood, it will have a particularly great impact on language development. People say that deaf and mute people are together. How can you learn to speak if you can't even hear it? If the deafness occurs later in life, it will have a certain impact, but the impact will not be particularly great. Daily communication may still be fine. Assistive hearing aids can be taken.

If you have poor hearing and often hear people talking but don’t understand what they are saying, you will gradually become less fond of talking to others. , but the more this happens without the stimulation of sound and language, the faster the auditory nerve will degenerate, the slower the brain will be in processing this type of information, and the ability to understand language will become worse.

The more severe the degree of deafness, the more obvious the language barrier.
Hearing loss is below 25dB, generally there is no language barrier, and it does not affect normal speech communication.
The average hearing loss is 26 to 40dB. There is no difficulty in hearing ordinary speech sounds, but it will be difficult to hear in meetings with many people, and smaller sounds are difficult to hear.
The average hearing loss is 41-55dB, and it is difficult to hear speech at normal volumes. If it occurs in infants and young children, it can cause language development delays and affect the child's language learning.
The average hearing loss is 56-70dB. It is difficult to hear and understand loud speeches. If it occurs in infants and young children, it can cause significant delay in language development and abnormal pronunciation.
Average hearing loss is 71~90dB, can have a sense of loud sounds, but cannot distinguish speech sounds, which can lead to language disorders.
The average hearing loss is more than 90dB, the language barrier is obvious, and normal social interactions cannot be carried out through listening and speaking.

People’s speech sounds are composite sounds, consisting of low frequency, medium frequency and high frequency. Children with hearing impairment or deaf people experience sound differently. Most patients with sensorineural deafness can only feel and transmit low-frequency sounds, but cannot feel mid-frequency and high-frequency sounds. Deafness is like a filter. You can only hear a certain part of normal speech. Being able to hear the sound clearly is the key to understanding the language. On the basis of hearing clearly, you also need to learn to truly understand the language. So I can only hear the sound but not clearly what is being said.

There are currently 800,000 deaf children aged 0-7 in my country, and the number is increasing at a rate of 30,000 every year. The average hearing level of normal people should not be greater than 25dB, otherwise it is considered to have hearing loss. The more severe the hearing loss, the more obvious the language impairment.