Electrical Noise emitting from speakers when I launch any app that uses sound mainly!

Discussion in 'MacBook Pro' started by hectrobeing, Aug 13, 2010.

  1. hectrobeing macrumors newbie

    hectrobeing

    Joined:
    Jan 11, 2008
    #1
    Hi guys

    I just received my refurbished Macbook Pro 13 2010 standard config and it emits an electrical noise when I use my DVD player app, itunes and when I play music and video on youtube.

    When I close the app or tab (in youtube case) the sound stops.

    The sound is really annoying; is this common on Macbook Pro's or this a case of return it to Apple for a replacement?

    Thanks for responses
     
  2. spillproof macrumors 68020

    spillproof

    Joined:
    Jun 4, 2009
    Location:
    USA
    #2
    Is it almost like that sound a snowy tv channel makes but really quiet.
     
  3. Timur macrumors 6502a

    Timur

    Joined:
    Oct 14, 2008
    #3
    OS X turns off the speakers 30 seconds after their last use, that is why they stop emitting noise.
     
  4. hectrobeing thread starter macrumors newbie

    hectrobeing

    Joined:
    Jan 11, 2008
    #4
    yes exactly, I can hear it now while typing this now and playing music!

    Do you have it too?
     
  5. hectrobeing thread starter macrumors newbie

    hectrobeing

    Joined:
    Jan 11, 2008
    #5
    So it is common and I have to live with it?
     
  6. spillproof macrumors 68020

    spillproof

    Joined:
    Jun 4, 2009
    Location:
    USA
    #6
    Well, some people state that this "issue" is hardware related due to the crappy sound cards Apple has been using for years.

    I have to agree becasue I have the hissing static on my late 08 MPB (the first of the aluminum unibodies). I don't use external speakers, I just use headphones, but whether or not I hear the sound is dependent on the headphones I use.

    Some common fixes: using higher impedance headphones (more ohms - aka higher quality), using an external volume controller (like this), or getting a good usb sound card.

    From experience, I can say that I do not hear any hissing static using mid 2009 or later Apple earbuds (23 ohms??) or my really old pair of Maxell NB303s (32 ohms). However, I do hear the hissing static with my 35 and 16 ohms headphones.

    Trying different speakers and headphones was my solution.
     
  7. hfletcher macrumors 6502

    hfletcher

    Joined:
    Oct 10, 2008
    Location:
    UK
    #7
    I don't know if this is of any relevance at all, but when I had my old 2008 MBP, whenever I plugged in something with USB, I would get a kind of high pitched noise from the left hand speaker where the USB was plugged in.

    Not sure if this helps at all...
     

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