On Sep 1, 11:59 am, Weatherlawyer wrote:

It seems to me that this focii problem will turn out to be a matter of
acoustics rather than the random stress release of plate tech.
http://groups.google.com/group/sci.g...se_frm/thread/...

I have been trying to ignore the obvious with the propagation of
cyclones and that other end of the trumpet, anticyclones. I want to
find out what causes channels in the air by which the song of the
earth is carried from one place to another.

It isn't enough to suppose that sound in the upper atmosphere has to
travel somewhere and from somewhere else.

Sound from a stringed instrument is intimately connected to the way
the string is set up and what plucks it. It doesn't just happen. Of
course it doesn't. But I am not worried about explaining how it occurs
in the sky in the first place. That bit is obvious.

I am worried about where it goes to next. And maybe how it is
constrained in getting there.

The roaring noises of a distant river or road that can on some days be
heard more clearly than on others, tells us that some sort of
inversion channel is in place. The same sort of weather betrays
aircraft noise patterns and other strong noises whatever their source.

We know that it must be being channelled. And we think we understand
how inversions bend and flex the sound waves involved.

The question left then is: Does it work up higher in the atmosphere?

And the make or break one:
How does it get back down into the earth?

I think I posted this somewhere about a month or so bback but I can't
find it. So let's see if I can rework it.