Wireless energy transmission via sound waves

AI Thread Summary
The discussion explores the concept of using ultrasonic or infrasonic sound waves to vibrate a magnet, potentially generating electrical current. It highlights the principle of resonance, where one object vibrating at another's natural frequency can transfer energy. A participant points out that microphones operate on a similar principle but are known for their inefficiency. Another contributor references a vibration-powered generator linked to a furnace as an example of energy conversion. The conversation emphasizes the need for calculations to assess efficiency if the sound wave concept is viable.
Nickj800
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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.
 
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Welcome to PF.

You are describing a microphone! They are extremely inefficient.
 
oh ok, never knew how a microphone worked.

thanks for the reply.
 
Nickj800 said:
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.
 

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