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Funda about Micropnone

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sushant

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In a microphone,how the mechanical vibrations generateAFvoltages?
Why are these voltages proportional to vel. or amplitude of the moving element?
In a carbon mic.,how varying pressure on C-granules modulates a steady DC current? -sushant,3rdSem.ElectricalEngg.NITR,INDIA.
 
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