Wireless energy transmission via sound waves

[Nickj800]

Main Question or Discussion Point

Today in my high school physics class, we were shown that object 1 vibrating at object 2's natural frequency, can cause object 2 to vibrate. So since you are transferring energy, i was wondering if its possible to use ultrasonic or infrasonic sound waves to vibrate a magnet, causing a current to flow through a wire. Does anyone know if this has been done? Is there a way i can calculate how efficient it would be? Assuming the concept works.

p.s. The magnet idea is the first thing I thought of, but if you can think of any other ways to convert the energy into electrical energy, feel free to let me know :D.

 

[russ_watters]

Welcome to PF.

You are describing a microphone! They are extremely inefficient.

 

[Nickj800]

oh ok, never knew how a microphone worked.

thanks for the reply.

 

[michaelwoodco]

oh ok, never knew how a microphone worked.

thanks for the reply.

I am subscribed to a few magazines, but I saw something like this.
http://en.wikipedia.org/wiki/Vibration-powered_generator
I believe it was hooked up to a furnace as another way to get power from inconsistent flames but I don't remember all the details.