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Computer RF Getting Into Microphone

Discussion in 'Electronic Repair' started by Spin, Nov 25, 2007.

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  1. Spin

    Spin Guest

    Since purchasing a tabletop usb condenser mic, listeners on a chat site tell
    me they are hearing severe intermittent "squealing & distortion". I am using
    headphones, no speakers connected to the computer so i can rule out audio
    feedback as the problem. I'm of the opinion that rf from the computer may be
    getting into my mic. The mic's usb plug does 'not' have a ferrite rf choke.
    Besides placing a choke on the above usb plug, i will also place a choke at
    the base of the mic. I will try to acquire ferrite chokes from a discarded
    vga monitor or purchase "snap-on" chokes from radio shack. Any suggestions,
    advice etc. would be appreciated. Thank You.
  2. Well if this is a USB microphone, a ferrite choke should make no difference.
    The sound will be digital data rather than analog audio on the USB cable. I
    have had a problem with small condenser squealing mic's when I cover the
    hole with my finger. I have no explanation for this phenomenon, but may be
    what you are experiencing. Have you tried a standard analog mic instead?
    There may be some issues with your USB mic.

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