radio interference inside a wall?
May 01, 2007 by Anon omus | Posted in Maintenance & Repairs
there is a wall in my front entry, bordering the inside of my closet, that the house plan shows that is hollow, the thing is, its emmitting strange radio frequencies, not like voices but buzzing or bells we have wifi internet but when we hold radio up to the hub it makes a different noise. we are almost 100 percent sure it is something inside the walls and not something in the closet. we are the second owners of this house built in 1994, and we know from experiences in the past that the builder/contractor took some shortcuts to save money, resulting in damages ranging from premature rotting deck, leaky pool pump, leaky water faucet/water heaters, to slight mold/mildew issues throughout the house. the only thing i want to know is why my wall is making such strange radio interference and how i can stop it, and WHAT THE HECK it is.
is it common in houses?
i have a radio that picks up interference from inside the wall, no other radios of mine do, when you take the radio outside or away from the wall the interference clears up, itsnot radio static from the station its in the house.
How do you know it is emitting strange radio frequencies? You can't hear at radio frequencies--it is much too high. However, if something is making radio frequency interference (RFI), you may be able to hear the resulting static on a radio or TV. But if you hear buzzing or bells coming out of the wall, that is not radio frequency interference at all. You've got some source of audible noise.
The architect that drew up your house plans would not normally leave a hollow space without some purpose. What it may be is a "chase", which is an enclosed area from floor to ceiling that is used for mechanical functions including heating/ac ducts, exhaust fan ducts, drain pipes, water heater inlet air and the like.
So you may have something that is moving around in this hollow space, making noises. If the attic is directly over this space, or the basement or crawl space is underneath, why don't you try to see if there are any ducts or pipes going through this area. If you can't look in the top or bottom, go ahead and cut a hole in the drywall to take a look inside. It's not that hard to patch drywall. If you don't know how, look up my last answer for help.
COMMENT BASED ON ADDITIONAL DETAILS PROVIDED 15 HOURS AGO:
I'd be interested to learn if only one of your radios has this effect when in proximity to the hollow wall. What I'm thinking is that there may be a large metal object in the wall. Large metal objects tend to behave like antennas, absorbing and focusing radio energy. This energy is probably coming from a local source--perhaps a radio station, a CB radio, a television set gone awry, or, heaven forbid, a radio amateur ("ham"). When your radio comes close, its circuitry is not selective enough to reject this higher strength out-of-band radio signal, as compared to the weaker signal for the station you are listening to. Other radios, with other circuitry, may not have this problem.
Tech Dude | May 02, 2007