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  1. #1
    Join Date
    Apr 2011
    Posts
    1

    Default How can I stop electrical noise from entering the audio stream on my laptop?

    When connected to the AC power source, my laptop (an Acer 4520) generates a more than acceptable amount of electrical noise through the headphone jack.

    Short of buying an external sound card what are my options to put an end to this or is it simple a design flaw?

  2. #2
    Join Date
    Jan 2008
    Location
    Tallahassee, FL
    Posts
    11,294

    Default

    Do you use the laptop in the boat? What kind of boat do you have?
    My Mom said I'm not allowed to get wet!
    2008 LSV
    2000 Outback LS (sold)
    Exile Tunes
    PWI
    LLTR!!!!!!!!



  3. #3
    Join Date
    Aug 2010
    Location
    Acworth, GA
    Posts
    1,221

    Default

    First you need to pop the cover off, then carefully hover your hand over the motherboard, when you find the really hot part, that is the CPU, now carefully stick your tongue on it. When you stop screaming you won't care so much about the noise.
    Kraig - 2010 Outback V

  4. #4
    Join Date
    May 2009
    Location
    Dallas, TX
    Posts
    880

    Default

    This should be an easy fix. When running off the internal laptop battery you probably will not have a noise problem but when switching over to the laptop external power supply you get noise. The stereo headphone jack is 3-conductor with a common ground that probably references chassis ground. The stereo RCA input shields/grounds are actually floating or 'above ground' and will not register complete continuity to chassis ground if you check this out. So you want to install a standard stereo RCA ground loop isolator on the auxilary input. This magnetically couples the RCA ground shields via transformers but provides the required DC isolation. No promises, but this should halt the noise coming from the power supply.

    David
    Earmark Marine

  5. #5
    Join Date
    Jan 2008
    Location
    Tallahassee, FL
    Posts
    11,294

    Default

    Guys, I posted my questions above because this guy is a suspected spammer. Who puts as their first post on a boating forum a question about sound on his laptop?
    My Mom said I'm not allowed to get wet!
    2008 LSV
    2000 Outback LS (sold)
    Exile Tunes
    PWI
    LLTR!!!!!!!!



  6. #6
    Join Date
    Jun 2008
    Location
    De Pere WI
    Posts
    4,198

    Default

    betting he is a spammer.

    he probably would not be a suspect if he had posted about viagra or cialis
    '06 Supra Launch 20SSV-gone but never forgotten

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