"Joe Egginton" wrote in message
...
Hello All,

Since last Sunday night (9th October), I've heard a low frequency hum.
It's especially can be heard downstairs. If I go outside, it's less by
the house, but moving away the house, it's inaudible.

The only two nights it wasn't audible was last Wednesday and Thursday night.

Could the atmosphere be increasing the range of nearby factory noise.
The nearest factory is about 2 miles away.

I sometimes figure I can hear it in the small hours when it's very
quiet outside. I sometimes wonder if it's the fridge and some kind
of resonance effect, though I've never actually been bothered to
go downstais to see if it's on!
Can it ever be *totally* quiet anyway in an urban location?
I would have thought that distant traffic at least would pretty much
always be audible once other nearer sounds have vanished.

Col
--
Bolton, Lancashire.
160m asl.
Col