wrote:
http://www.silcom.com/~aludwig/EARS.htm

Mr.Ludwig opens:
"Music and The Human Ear

This section contains information on the softest and loudest sounds we
can hear, the range of frequencies we can hear, subjective vs.
objective loudness, how we locate the source of a sound, and sound
distortion. The human ear is a truly remarkable instrument. At one
point in my life I designed Electronic Counter Measures (ECM) systems
for the U. S. military. The primary function of an ECM system is to
detect an enemy before he (it's rarely a she) detects you, for
self-defense. It is interesting to compare the characteristics of a
good ECM system and human hearing:"

I want she enemies Mr A Ludwig. I don't want the Mad Hatter . Not if he
wants to touch my amps.
Ludovic M.