Joe Egginton wrote:
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.

Joe
Wolverhampton
175m asl

I've noticed this for years in every property I've lived in!