Hearing-aid (the 4th)

Published:2011/6/6 5:07:00 Author:Felicity | Keyword: Hearing-aid (the 4th) | From:SeekIC

Work of the circuit The hearing-aid circuit consists of power circuit, volume amplifier circuit and amplifying output circuit. (It is showed in picture 9-80.). Turn on the switch S and GB supplied 1,5V voltage to the circuit. BM turns the sound signal it collects into electric signal which drives BE to make sound after being adjusted by V1,V2 and V3. If you change the value of RP you can change the volume.



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