It is possible to convert sound energy into electrical energy?

Question

It is possible to convert sound energy into electrical energy?

Answer 1

Not really, not for any thing that can power anything substantial.

Answer 2

That's exactly what microphones do.

Answer 3

Sound is a changing pressure of air - so if you put something in its way, it'll exert a changing force on this object. If you put a piezoelectric crystal in the way, the changing force makes voltage on it (piezoelectric crystal has changing electric polarisation due to applied force) This is how piezo-microphones work. Other way is putting a small iron membrane that is between two magnets - the moving membrane  feels the changing magnetic flow and this induces voltage in the membrane. (Faraday's law) this is how dynamic microphones work. Other microphones use rather changing resistance of some material after sound is applied, and do not convert the sound to electric energy.

Answer 4

Sensor does it. I ever saw lamp which turned on when we shout nearby it.

Answer 5

yes.

if it is possible to convert electrical energy into sound,

it is possible to convert sound into electrical energy.

an example: wind power

we can use the wind's spinning motion to generate electricity,

so we can use electricity to create spinning motion.

another example: solar power

we use electricity to make light

we can use light to make electricity