Stan Kelly
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It sounds like it could be wind related. Are there any guy wires supporting the antenna? They could be vibrating in the wind and you're hearing the sound through the anchors in the ceiling. If not, it could just be the antenna itself vibrating in the wind. It sounds like the antenna is a like source. If you can get to the roof, go up there next time you here the sound and check for any vibration on the antenna. Good Luck,
Stan
14 years ago
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pmac10
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this may be 'mains hum' your experiencing, its basically the 50 or 60 Hz frequency of your electricity supply being picked up and amplified by mains operated electronic systems in your apartment, anything from an alarm clock to television, probably easier to check vibration from the tv antenna first though.
for more detailed info on mains hum and how to prevent it check
http://en.wikipedia.org/wiki/Mains_hum
14 years ago
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Mark Montgomery
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You're apparently not alone: http://www.eng-tips.com/viewthread.cfm?qid=174011
14 years ago
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aperol
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More info from me...
Thanks for replies to date. Here's a little more info that may help:
The humming sound is completely random - it doesn't come on at a particular time, or when any particular plumbing or electrical device is being used.
The noise was audible before I moved into the apartment (but I didn't notice it til after I had signed the contract!). So I think that rules out any of my belongings (tv, stereo, alarm clock etc) being responsible.
I had some cosmetic (but no structural) renovations performed prior to moving in. This included plastering over some vents in the brick work. These were traditionally required in double-brick buildings for air circulation, but are no longer regulation (in Australia). In fact they just let in cold air (in winter) and noise. The vents inside the apartment were covered, while the vents on the outside were not. Could breeze be getting in the wall cavity and bouncing around? Am guessing this is unlikely.
My best guess is that it is related to the antenna. If it IS the guy-wires or the trunk of the antenna itself, how can the vibration be rectified?
14 years ago
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