I wonder if it is possible to make a noise helmet with an arduino (or raspberry pi).
I know the physics behind this technology. But I ask myself a lot of question on how to analyze and then send the sound In phase opposition of external noise.
Does anyone have any advice? How to analyze sounds?
Should I use an arduino or a raspberry pi?
Plain analog circuitry would do this well. And the arduino isn't really fast enough.
regards
Allan
Look here - can get a noise cancelling kit for $30
http://www.warrengregoire.com/amateurradio-headsets.htm
I modified my airplane headsets with these kits. Does a great job of taking the low frequency engine throbbing out of what you hear, makes comm's much clearer.
Plain analog circuitry would do this well. And the arduino isn't really fast enough.
I would think you would have to qualify that statement. With "plain analog" circuitry you would be limited by the inherent phase shift at certain frequencies.
While an Arduino such as an UNO would obviously be a poor choice, there is at least one product line that I believe could do that. Paul Stoffregen's higher end "Teensy" boards such as a 3.6 that sports 180MHz M4 should have the horsepower to do 44KHz Sampling and playback when coupled with his Audio board.
Like everything Paul does, it's supported with libraries. I like "CrossRoads'" idea too, as it seems a lot less work than another solution.