[OT]: Sound Nullification

[Clarence Wood]

  I read an article, some years ago, about removing noise.  The process was to have a microphone pick up the sound, the circuit would change the wave form to 180 deg. of original and then send this out of a speaker.  The 180 out sound would null the original sound.  The only weakness to the unit was that it had to be placed close to the origin of the noise.  
  I would like to build this circuit but don't have the audio/electronic knowledge to design the circuit.  I have a compressor that really needs to be silenced!
  If anyone has any information, or ideas, on how to design the circuit please contact me off list.


IZCC #3426
 1982 280ZX Turbo GL
 1966 El Camino
 1982 Yamaha Maxim XJ-1101J Motorcycle
 1975 Honda CB750 SS (black engine)
 1986 Snapper Comet lawn mower
Clarence Wood
Software&Such...
clarencewood at centuryinter.net
Savannah, TN.