How Microphone and Speaker  Works ? | PhonoGraph AND Gramophone | Microphone, Speaker and Storage | Edition 

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PhonoGraph for automation of speech for telephone transmission.

Wooden Cylinder thin Sheet Of foil wrapped around it, Needle with horn attached presses against the foil.

Gramophone cylinder replaced by a Disc needle was Stylus. Gear Driven motor System.

Microphone, Dynamic Microphone Diaphragm coil Magnet, Condenser Microphone Capacitor metal plates moves Diaphragm Problem with DSLRs ? , Shotgun Microphone, Wireless microphone radio Signals.

Storage Technology Mechanical Storage Technology HDD actuator Magnetic, Static or Electrical Storage Technology flipflop NAND

Speaker Diaphragm Coil Magnet.

About Edition.  !   

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