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where does sound come from

post #1 of 3
3/30/12 at 10:49pm
Thread Starter 

well the title saysit all... i understand the principle of a voltage being applied to a magnet with then pushes a diaphragm to and fro in such a way that creates noise. but what exactly creates the noise on the diaphragm? do each individual wave come from a different spot on the diaphragm? what happens there?

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post #2 of 3
3/31/12 at 8:24am

The motion of the diaphragm causes changes in air pressure. See wiki: sound.


Edited by xnor - 3/31/12 at 9:07am
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post #3 of 3
3/31/12 at 9:52pm

As the diaphragm moves forward, it pushes air forward increasing the air pressure, and when it moves back the air pressure drops. Sound is essentially a rapid change in air pressure. E.g., when you clap your hands you suddenly increase the air pressure between your hands and that is what produces the sound.

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