机械工程概论双语
课题: 助听器
姓名: 谭伟
学号: 20127733
指导教师: 李怀仙
完成日期: 2012年12月27日
成绩:
Abstract
It's easy to take sound for granted, but when you lose it ,due to a serious hearing disorder。How do you do ?
thankfully this tiny hearing aid bring back the music Loose of hearing causes a serious handicap, but happily It can be remedied thanks to hearing aid. A hearing aid is an electric device which typically fits in or behind the wearer's ear, and is designed to amplify and modulate sound for the wearer. Earlier devices, known as ear trumpets or ear horns,Similar devices include the bone anchored hearing aid, and cochlear implant.
图 1 Invisible hearing aid
1. Introduce about hearing Aid
Hearing Aid is a help to Hearing crippled improve Hearing impairment, and further increase the session with others of munication ability of tools, equipment, equipment and instrument, etc. Hearing AIDS have the power and the power of the two kinds, the latter at present has been abandoned. The former and tube type and transistor type two kinds. Transistor type hearing aid the most clever light, appeared in 1950 after replace valve type and is widely used. In a broad sense that can effectively put the sound to the ear various device can see as hearing AIDS, a narrow sense about hearing aid is a electroacoustic amplifier, through it will put the deaf hear voice ambassador to the original can not hear clea
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