Omar

Wouldn't you be better off directly harnessing the water? (As is already done).

I'm trying to find a new way to get more energy that's it

Imagine the sound level at a rock concert. It's much louder noise sustained over a longer period than you are likely to get in pretty much any typical environment that you'd rig your system up in. It takes a certain amount of energy for the speakers to produce that much sound over the course of the concert.

If you rigged every surface of the concert venue with microphones to capture all of the sound out out by the speakers, the maximum amount of energy that you could possibly generate is less than the amount required to power the speakers.

Anything short of covering every surface is going to generate proportionately less energy, and this is assuming much better efficiency in terms of energy conversion than is reasonably practical.

So basically rigging up as many microphones you want at an incredibly loud rock concert wouldn't even give you a small fraction of the needed juice to run the speaker system.

You're right but what if we use natural continuous sounds like waterfalls or waves crushing on shores?

So the basic gist is, if you have an hour long football game, you can heat up one cup of coffee with microphones in an hour, of in a couple of minutes with a microwave oven.

 

I think the phrase energy density applies here.

With one microphone I'm talking about hundreds of thousands of microphones if not millions

The calculation in the example already assumes that you're gathering all the energy. If you have 120 dB at the microphone, you have more than 120 dB at the source.

 

Unless you have a source so loud that it causes hearing damage, it's never going to be a lot of energy.

I don't need to get the whole watt I was just using an example even if the value is small but the number is huge doesn't that make it usable?

What about the big number of microphones connected together? Doesn't that mean 1 watt from each microphone that takes 120 dB, the more microphones we use the more energy we get?

I know it doesn't carry enough energy and I know we can't get more energy of it than it has but what about amplifying the current by transistors? And what if I use a huge number of microphones and connect them together and put them in places with a great amount of noise like stadiums or concert halls?

I've had this idea for a while now is it possible to achieve? It's based on the diaphragms in microphones and how they produce weak currents, what if we put huge number of these mics in stadiums and concert halls and connect them with each other's while rectifying the current then amplifying it using transistors?