Don Pearce wrote in message news:4953186d.528987093@localhost...
On Wed, 24 Dec 2008 11:07:26 -0000, "TonyL"
wrote:

geoff wrote:

It is known as The Hum, and there are all sorts of conspiracy
theories about it, from weapons research, government mind-control
beams, aliens, phantom planets, the Sun getting ready to implode,
electrical feilds, HARRP, gravity waves, etc, etc, etc. Most
adherents to those ideas radically HATE the idea of something as
mundane as (LF) tinnitus.

You obviously have you mind made up about whatever it was that you were
hearing and that everyone who differs must be a raving nutcase. But....

I had The Hum for years when I lived near Wolverhampton. An LF pulsing
sound
that sounded like a large truck parked with its engine running. It started
soon after a large gas main was installed nearby and I could "hear" it in
and close to our house, especially at night. It sounded so real that I
would
wonder around the house looking for the source. Nobody else could hear it.

I'm not sure it was tinnitus because I only ever heard it in/around the
house. It was so location specific. I recall pulling up onto our drive
after
a completely hum-free holiday and turning off the car
engine....immediately
I could hear The Hum. Since we have been living in Wales for the last 9
years I have never heard it.

I don't know what it is but I would not dismiss it out of hand as LF
tinnitus.


Ever try recording it? That would have settled the matter once and for
all.


And in that case - try recording it on a laptop, with a widely separated set
of stereo mikes. Turn the set in different directions and look at the phase
relation - should indicate direction.

I found a "humming source" that way (transformer house with a resonating
wall). I used a program to display the live stereo phase vector (AFAIR
Cooledit 2000).

Regards,
Arie de Muijnck