How to relate power and sound give some formulas

[exilus29]

can some1 teach me some formula on how to relate power(mW/W) to sound(dBv/dBSPL)?i need some formula about this two topics and relate them because we are having a feasibility study on how to convert sound to electricity and we need some formulas,i know its kind a hard to transform sound to electricity but we really need some help..hope many of you would reply need some feedback asap

 

[Naty1]

It is done billions of times everyday in a telephone...and audio recording devices...

Try here:
http://en.wikipedia.org/wiki/Sound

 

[Bob S]

Use this online calculator to convert SPL (sound power level) in dB to watts per square meter. See

http://www.sengpielaudio.com/calculator-soundlevel.htm

Bob S