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Strange high frequency sound coming from phone when connecting to USB

Discussion in 'Android Devices' started by CuBz, Oct 28, 2010.

  1. CuBz

    CuBz Android Expert
    Thread Starter

    I put a new SD card in my phone, and when I connected it to my laptop via USB, it started making a very high pitched, annoying, noise....it continued until the drivers had installed, then it stopped instantly.

    I will ask the exact question that was on my mind when i heard it...

    ...What the hell was that?!?!????

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  2. X10iUser

    X10iUser Android Expert

    Not got a clue.
  3. CuBz

    CuBz Android Expert
    Thread Starter

    Just did a Google search and it seems alot of people with various Android phones also get this but nobody seems to know what it is :thinking:
  4. morpheus2n2

    morpheus2n2 Well-Known Member

    It's the capacitors in the phone almost all electrical equipment dose this when there is a voltage going through them 9 times out of 10 you can't hear it or its just background noise but now and then you will notice it, I get it from time to time from the charger itself its nothing to normally worry about unless its all the time and increasing in level, if it starts to do that then it needs looking at.

    Prim example is listen closely to any TV when its on you will find a high pitch noise :)

    So in short don't worry unless its all the time and getting loader.
  5. CuBz

    CuBz Android Expert
    Thread Starter

    I should have mentioned this earlier, but the sound was coming from the phone speaker, I am 100% sure of this as I put it to my ear when I was looking for the source of the sound. I was already aware of what you explained, but the fact that this noise came from the speaker, is what is baffling me

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