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Intermittent Interference

Discussion in 'Electrical Engineering' started by Monks, Aug 30, 2006.

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  1. Monks

    Monks Guest


    Ever since I moved into my house, all of my equipment has been experiencing
    some kind of interference. This is usually a "farting" noise that comes
    through the speakers (home theater, computer, guitar amplifier, telephone,
    etc.). As far as I can tell, this noise only occurs to devices plugged into
    the house's electrical outlets and phone jacks. There is no pattern to this
    noise. I kept a log for a while, but it didn't tell me anything. The noise
    will last from anywhere between 5 seconds to several minutes. It occurs at
    all hours of the day/night, regardless of which day it is. It also does not
    correspond to any of my appliances (central heating, washer/dryer,
    dishwasher, refrigerator compressor, etc). I have all the same equipment I
    had at my old house, and I never had a problem. It does seem to happen more
    often when there is moisture in the air (during the summer it doesn't happen
    nearly as much as it did last winter). Now, since it is getting more foggy
    at night, the noise is becoming more frequent again.

    Electricians have replaced the entire electrical panel for the house. They
    have put in a new ground post (8 feet deep) and hooked up to a different
    feed from the utility company. None of these solutions worked.

    I have some video I took on my cell phone of this noise and posted it to
    youtube. Please take a look:

    Thanks for taking the time to read this.ANY suggestions would be greatly
    appreciated. If this is not the right group to post this, I'd appreciate
    some redirection.

  2. gorehound

    gorehound Guest

    Do you live near an emergency outpost or something like that? I am not an
    expert in electronics or electricity, but I live next to a fire department,
    and a busy highway where people are getting stopped by the police alot. I
    hear the interference from their radios through my speakers, although I
    can't make out anything they say. I just here a buzzing much like you
    recorded. It also seems strange that you hear it happens during bad weather
    because that's when it happens more often here. Just a thought.
  3. ehsjr

    ehsjr Guest

    There may be a cracked HV insulator on a power line,
    causing intermittent arcing - arcing might cause your

  4. EpsilonRho

    EpsilonRho Guest

    Is there any way you can surely determine if the noise is transmitted
    through air or conducted through the house wiring or both?
  5. Monks

    Monks Guest

    The only way I have tested this is by using my little 9-volt battery-powered
    guitar amp. It does NOT get the interference and it's not using house power.
    I don't have a power supply to be able to plug it into a wall outlet to test
    for sure.

    It doesn't happen on my cell phone either.

    I am going to try shutting down circuits one-by-one in hopes that there is
    some miswiring at one of the wall outlets. I'm just grasping at straws now.
    I really don't want to move but may have to.

  6. Monks

    Monks Guest

    Do you mean in the house wiring? Is there any way I can do a point-to-point
    test to see if this is the case or not?

    Thanks for the idea.

  7. Monks

    Monks Guest

    Interesting. You're the first to have heard a similar sound. It's possible
    that it's a radar/police radio because I am near a main road people travel
    down. I don't hear voices though, it's exclusively that farty sound like in
    the vid I posted. Also interesting that you get it when it's bad weather.
    I'm POSITIVE this has something to do with it but still don't know what to
    do next, other than to move. Thanks for the reply.

  8. ehsjr

    ehsjr Guest

    No - not in the house - outside on the utility power pole.
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