DC current discharge and sound

Discussion in 'General Electronics Chat' started by short2ground, Mar 31, 2015.

  1. short2ground

    Thread Starter New Member

    Mar 31, 2015
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    Is it possible for high pitched sound to be emitted when a DC current is discharged at a high rate for example during direct short to ground from a battery source?
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    Not very likely. You'd have to imagine something vibrating at a high frequency. So far as I know batteries don't vibrate and neither do wires. A spark might be classified as a "high pitched sound" but you didn't mention sparks in your original question.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
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    It is often the exclamation that comes from the one who shorted the battery to ground!:p
     
  4. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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  5. alfacliff

    Well-Known Member

    Dec 13, 2013
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    but just discharging a dc current to ground is not a plasma speaker. the plasma speaker has a modulated high voltage.
     
  6. short2ground

    Thread Starter New Member

    Mar 31, 2015
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    So no resonance through wire material or as a result of heat generation? What about the battery itself and internal components reacting to rapid discharge (lead/acid)? OR from reverse flow through full wave rectifier if it were shorted or open at one or more diodes?
     
  7. Papabravo

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    Feb 24, 2006
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    Nothing comes to mind. Has anybody else experienced this phenomena?
     
  8. Roderick Young

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    Feb 22, 2015
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    A defective lead-acid battery might whine.
     
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  9. short2ground

    Thread Starter New Member

    Mar 31, 2015
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    how might this happen? Are u referring to the gasses escaping the battery or some other cause?
     
  10. #12

    Expert

    Nov 30, 2010
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    I believe you heard something, but I also believe you were deceived. Some other substance must be involved, such as melting, boiling, and rupturing of insulation on the the wire carrying the current or a substance on the surface of the "ground" being vaporized.
     
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  11. Roderick Young

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    Feb 22, 2015
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    Unfortunately, I don't know the mechanism. I do know that I heard a mystery whining sound, and when I disconnected one of my lead-acid batteries, it stopped. That battery would normally be maybe 13 volts, but it was down to 10, and I was unable to charge it.
     
  12. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    sounds sorta like what a teapot might do when the steam escapes through a small opening. out-gassing from the battery seems the most likely explanation.
     
  13. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    Inasmuch as a direct current metal-arc is, necessarily, 'disruptive' (and, hence, 'oscillatory') in nature, it would seem possible from a theoretic standpoint --- Although I cannot claim personal experience of the phenomenon...

    Just my $.02

    Best regards
    HP
     
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