Sonic power generation

Factual Questions
1

As those of you who, like me, have studied the way audio equipment works, know that a dynamic microphone actually generates its own electricity when it picks up the air-pressure disturbances we know as sound.

That has me wondering… would it be feasable to set up a huge number of dynamic mics around a very loud natural sound source, say a waterfall, and generate power or would it end up costing more than the power it would generate?

2

Those currents are very small and weak. It would be more economical and efficient to simply dam the waterway and use gravity to generate electricity.

3

And they’re also crappy friggin microphones, to boot.