MICROPHONES Secondary transducer:

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Presentation transcript:

MICROPHONES Secondary transducer: Are the transducers that converts variation in sound pr into analogous electrical signals Microphones generally employ a thin diaphragm which converts pr into displacement Displacement is subsequently converted into suitable electrical signal by employing a secondary transducer Secondary transducer: Capacitor type Piezoelectrical crystal type Electrodynamic type Carbon granual type

PIEZO-ELECTRIC CRYSTAL MICROPHONE

ELECTROMAGNETIC MICROPHONE

CAPACITIVE MICROPHONE