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It’s like wearing glasses if you can’t see clearly, and people who can’t hear need to wear hearing aids. Hearing aids have been accepted by most people.Generally, there are no other contraindications. After wearing a hearing aid, it can be close to normal listening.But there are such hearing impaired children, they wear Hearing aid , But just refused to speak.

2. Distinguish: distinguish whether the two groups of sounds are the same, the same and not the same, which can include distinguishing long and short tones, distinguishing rhythm, distinguishing numbers, etc.;