http://www.stormcam.org/speaker-microphone/
speaker to microphone would it work?
i have wondered for sometime if you place a microphone in front of a speaker and then made a noise for the microphone to pick up and send it down a wire to the speaker when the speaker played the sound you had just made would the microphone pick it up and send it down again for the speaker to play it again if it does would that mean that you have a noise that will last forever due to it being in a loop?
i wouldnt mind seeing the tv theory in action!
It’s called “feedback”, and it will last forever or until (a) the system runs out of power or (b) the amplifier blows itself up due to the signal being amplified every time it goes through the loop. It can be even weirder with a tv screen connected to a video camera.
Using a speaker as a microphone!