Originally Posted By: Dignan
...

There is a vent fan in that room, but I know where the switch is and the fan is brand new. It's possible that the sound could be coming from it, but I'd be surprised...

I could try turning the breakers on and off, but I don't think that would tell me all that much about where it is. I already know that it has to be somewhat near that WC, but I don't know which direction. Like Tony's place, the breakers are mostly geographic ...
Turning the power off would at least clarify whether the noise is coming from an electrical device or something non-electric.

Powering down the entire house will also make the house very quiet, which might help you hear and possibly better locate the sound.


Edited by K447 (10/06/2014 03:25)