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Hearing aids(Hearing Aid Accessories Online) all include six basic structures.1. Microphone (microphone or microphone).Receive sound and convert it into an electrical waveform that is the conversion of sound energy into electrical energy.2. AmplifierAmplifying electrical signals (transistor amplification lines)3. Headset (receiver)Convert electrical signals into acoustic signals (ie convert electrical energy)For sound energy).4. Ear mold (ear plug)Place the external auditory canal.5. Volume control switch6. Housing.

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