In Reply to: Tracking down a noise posted by Awe-d-o-file on July 24, 2012 at 13:54:45:
Incoming power lines vibrating could be it. Used to work in a skyscraper where the power cable riser would vibrate at 60, 120 and 240hz. It was clearly audibe in the building. They had to add additional cable suports to stop it
Alan
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Follow Ups
- RE: Tracking down a noise - ahendler 21:46:52 07/24/12 (1)
- RE: Tracking down a noise - Awe-d-o-file 07:04:23 07/25/12 (0)