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Discussion in 'General Electronics' started by KellyClarksonTV, Jul 2, 2004.

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  1. Have you ever connected one speaker the right way and one backwards to an
    amplifier and put them close together? The sound somewhat "cancels out"!
  2. scada

    scada Guest

    You have just discovered the basics of an electronic noise canceling
    circuit! The speaker regenerates the unwanted noise at 180 deg phase shift!
  3. Rich Grise

    Rich Grise Guest

    It's not at a 180 degree phase shift, it's merely the inverse. If you
    don't believe me, run sin(x) + (0.5 * sin(2*x)) through an inverting
    amplifier. Show me the phase-shifted wave in the output.
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