[speedracing944]

I am hoping to tap into some of the knowledgeable folks here. The problem we have had for the 8 years we have been in our home is the main power cables which run from the power pole to the corner of our house transmits a unbearable vibration into our bedroom. The vibration can be heard on the outside power lines as well. It creates a loud, low frequency hum which reverberates through the entire room. The vibration is more noticeable during the winter months when it is cold outside. It is to the point to where we can no longer sleep in our bedroom at night. In the past, the electric company placed dampers on the power cables which resemble giant springs. This appeared to help a little but it could have been more of a placebo affect. I once had them lessen the tension on the power cables but all this did was vary the pitch of the vibration. The cable was hanging too far down to be considered safe and was tightened up again.

I am thinking there is a natural resonance frequency of the system, sort of like a guitar spring. I am not sure what is causing the system to resonate though. The only correlation I have been able to come up with is temperature.

How do I go about eliminating this problem? I am at my wits end and my wife is talking about just selling the house.

1880's farm house
1.5 stories
Power cable is attached to the corner of the house at the eave

Speedy