Audio signal on House Power System.

[unix60959]

Hey guys, I know this concept was tried back in the 60s? maybe 70's? Not completely sure but I do know that this idea was tried before. The idea is to use high pass filters in conjunction with the power system in your house to filter out the 120v @ 60hz and allow an audio signal to pass. So, in theory you should be able to hook an audio source somewhere into your power system and effectively 'plug' a speaker into any outlet/light socket in the house and be able to play music. I think that the only problem with this is that you still got some noise from the 60hz signal, but that was a long time ago and now capcitors are better so maybe there will be less noise?

Let me know what you guys think.

Thanks,

unix60959

 

[keith1200rs]

Search for power line communication. This link should give you a start: Power line communication - Wikipedia, the free encyclopedia

Keith

 

[SherpaDoug]

Long ago you might have been able to do this by simple analog filtering. But with today's switching power supplies and generaly poorer power line quality I think there will be far too much noise in the audio band. You MIGHT be able to do it by heterodyning the audio to a much higher frequency, maybe 1MHz, but you would have to do some research to find a good frequency band.

The more modern way would be to digitally encode the audio.