What Are The Five Levels Of Hearing?

What are the five levels of hearing?

The World Health Organization has classified hearing loss into the following categories:

1. An average hearing loss of 25 decibels or less is normal;

2. An average hearing loss of 26-40 decibels is mild hearing loss; the person can hear the sound of speech, but cannot hear it if the speaker is a little quieter or the speaker is far away.

3. An average hearing loss of 41-60 decibels is moderate hearing loss; the person cannot hear the speech at a normal distance.

4. An average hearing loss of 61-80 decibels is severe hearing loss; the person can hardly hear the speech, and the speaker has to raise the volume to hear it.

5. An average hearing loss of 81 decibels or more is extremely severe hearing loss; the person cannot hear the speech, and the speaker has to shout in the ear to hear it.

All hearing aids use the same basic components to channel ambient sound into your ears and amplify the sound. Most hearing aids are electronic, and all are powered by conventional hearing aid batteries or rechargeable batteries.

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Hearing aids work by amplifying the sound coming into the ear and passing it to the brain for processing. Hearing aids are made up of five core components, which are:

--1~2 microphones to collect sound

--1 sound processor, which can reduce background noise and provide clear sound quality

--1 amplifier, which can hear soft sounds

--1 small receiver, which transmits the processed sound back to the ear

--Rechargeable or disposable batteries.

The hearing aid collects sound through a microphone, converts it into an electrical signal and sends it to the sound processor. The sound processing makes the speech signal clear while reducing background noise. The speech signal is amplified by the amplifier and then transmitted back to the ear through the receiver.