is it possible to convert sound (noise) energy into electrical energy?

[zurgh]

how can i convert noise into something useful like electrical energy.. thanks

 

[lockman_akim]

Tiny generator turns vibrations into electricity -- Engadget

 

[djsfantasi]

How much electrical energy and what are you going to do with the electrical energy? Light up some LEDs? ...or simply detect sounds? A microphone attached to a simple amplifier circuit will do the latter quite nicely. Something like this post that discusses the https://www.edaboard.com/threads/82434/#post360741. Or this circuit or derivative can be used to scale the voltage to a higher range than that simply from a microphone: https://www.edaboard.com/threads/172642/#post784773

 

[KJ6EAD]

I think zurgh wants to tap the zero point field for limitless free energy.:idea: It will be used to operate a perpetual motion device.:wink:

 

[dick_freebird]

It is possible to harvest acoustical energy. The problem lies in
"useful". Basically any room you could stand to be in, won't
deliver enough energy to power more than a small circuit over
a short burst of time, at the cost of some elaborateness.

"Free" does not mean cost effective. Emphasis on effective.

 

[zurgh]

thank for your replies.. i just wanted to prove by that using sound energy converted to electrical it can power electronic gadgets. and be used as an alternative source of electricity.. :grin:

 

[FvM]

A simple example: A sound level of 80 dB (unweighted) corresponds to a power of about 100 µW/m². Assume a 12" speaker with an efficiency of 10% as transducer, so you can harvest 0,7 µW.