On Fri, 13 Apr 2007 03:09:54 GMT, james wrote
in :

snip
I stated how could one detect it without a scope? please reread my
post and comprehend better.


I reread the original post as well. It's pretty obvious, even to the
most casual observer, that you meant to say "subsonic".


100 Hz is hearable or percieved. As I stated before there is a subtle
difference bwetween audible and hearable. Yes you can "hear" 100Hz if
increase the signal power compared to a 1000Hz tone. But at equal
power desity, a 100 Hz tone by most people is not "hearable" or
audible.


I didn't see anything in his post about the loudness of this 100 Hz
noise. Whether it was "hearable" or "audible", it was detected
nonetheless. And apparently it was loud enough to cause a problem, so
it's safe to assume that this "noise" (his word) was detected without
a scope. Your damage-control explanation about subtle differences in
definitions just doesn't resonate.