"UnsteadyKen" wrote in message
m...

I came accross this manufacturer
http://www.h-cat.com/
The technique sounds convincing but the
technical explanation is way over my head.
Has anyone experienced this brand and could
an expert type have a look at the bumf, and
give a verdict, does it make sense or is it
a solution to a none problem?

100% extra virgin snake oil, the old technique, invent a problem and then
provide an expensive solution to it.

They can't even get their physics right:-

" There is only one other place in nature where this caliber of accuracy
occurs - and that is when sound waves travel through air at constant speed
of Mach One."

Certainly sound waves travel at mach 1, but mach 1 is not a constant speed,
it depends on the density of the medium which is why you sound like Mickey
Mouse with a lung full of helium, and, in air, it varies with the local
temperature and pressure.

As for an analogue amplifier producing doppler effects, well I suppose there
is one born every minute.

Keith

"keithr"

They can't even get their physics right:-

" There is only one other place in nature where this caliber of accuracy
occurs - and that is when sound waves travel through air at constant speed
of Mach One."

Certainly sound waves travel at mach 1, but mach 1 is not a constant
speed, it depends on the density of the medium which is why you sound like
Mickey Mouse with a lung full of helium, and, in air, it varies with the
local temperature and pressure.


** The speed of sound (or Mach 1) varies with the temperature of air (or any
gas) alone - pressure and or density have NO effect.

At the altitudes where passenger jets cruise, the air is very cold so the
Mach 1 speed is lower than at ground level.

Fact is, a sound wave moves forward at a speed just below the average
molecular speed of the molecules of the gas - cold molecules move slower
as do heavier ones at the same temperature.



....... Phil