Noise Capacitors

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

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May 23, 2006 #1

Iodem_Asakura Thread Starter Senior Member

Sep 14, 2004

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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.

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May 23, 2006 #2

beenthere Retired Moderator

Apr 20, 2004

15,808

293

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.

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May 26, 2006 #3

Iodem_Asakura Thread Starter Senior Member

Sep 14, 2004

140

0

Thanks for the answer. That makes sense.

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