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I've used this before in a pinch too, speaker as a microphone in reverse. that got me wondering... would it be possible to use the same principle with another t
by mathiasben 10y ago
I've used this before in a pinch too, speaker as a microphone in reverse. that got me wondering... would it be possible to use the same principle with another type of listening device. Focusing a laser beam on a window allows you to hear a conversation in the room. so could the same principle be applied and allow a laser beam to transmit audio?
- JimmyAustin 10y agoI'm not 100% sure of the math involved, but I think any laser that impacts a window enough to vibrate it would probably just melt it instead.
- dom0 10y agoYou can actually make music with a laser cutter.
- toomanybeersies 10y agoYou can use a laser to transmit audio to a LDR or a light sensitive transistor/diode, which can then be used to run a speaker (with a battery attached). Essentially fibre optics through the air. I did it once, the quality was rather lacking, since it used amplitude modulation instead of frequency modulation. Here's an instructable on it: http://www.instructables.com/id/How-to-Send-Sound-using-a-Laser/ http://www.instructables.com/id/How-to-Send-Sound-using-a-La... It's not quite what you're asking, but it's probably the closest you can feasibly get. I'm fairly sure that's also the way that laser microphones work as well.