I have a question
Ok, so i was revising for my physics exam on monday and i was just learning the whole theory of how a microphone works (with soundwaves making a diaphragm vibrate which then moves a coil through some magnetic field lines inducing an analogue current). And i came up with an idea. If sound can induce current the same way that steam can by turning magnet in a coil of wire, then why can't we use sound to make electricity?
You could put some kind of a giant super-sensitive microphone in a noisy city which could generate electicity with no fuel needed! Or everyone could have one in their house or in clubs or generally noisy areas?
I am pretty sure that there is a good reason nobody has ever thought of this, most probably because it wouldn't work for some reason or other. But the idea just came to my head and i was wondering if someone would like to explain to me why it wouldnt work or if i have come up with an engenious idea which will save the world from its fuel problems (which i doubt)
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