Noise Capacitors

Discussion in 'General Electronics Chat' started by Iodem_Asakura, May 23, 2006.

  1. Iodem_Asakura

    Thread Starter Senior Member

    Sep 14, 2004
    140
    0
    I'm interested in learn why some capacitors make noise (under what conditions?). I'm asking that because i fixed a monitor some day and after it was making some fine (acute) noise, and someone told me it was because of some capacitor.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    It might be that a ceramic capacitor was "singing". They sometimes exhibit piezoelectric characteristics. If tapped, they are microphonic, and generate a small electical output. Yours may be responding to a waveform and generating a mechanical motion - the noise - as a result.
     
  3. Iodem_Asakura

    Thread Starter Senior Member

    Sep 14, 2004
    140
    0
    Thanks for the answer. That makes sense.
     
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