On Fri, 10 Sep 2010 07:38:30 -0400, Arny Krueger wrote:
"AZ Nomad" wrote in message
On Thu, 09 Sep 2010 17:29:51 -0500, dizzy
wrote:
Bill Graham wrote:
.Also, the highest note on a piano is only around 8
Kilohertz, so
it's pretty much a waste of time to buy devices that
operate much above that, either, but that's a whole
different argument, and I probably shouldn't open up
that can of worms.....
You're right, you shouldn't. The are audible harmonics
above 8 kHz, no matter what the fundamental frequency.
http://en.wikipedia.org/wiki/Harmonics
Meanwhile most people above the age of about 25 are
totally deaf above 15khz.
Simply not true. It is usually a matter of frequency and SPL. Make it loud
enough and even many old geezers will reliably perceive sound above 15 KHz.
There really isn't much
information' between 10 and 20khz.
That very much depends on the nature of the music. Given a reasonble choice
of music, brick wall filters as high as 15-16 Khz can be reliably detected.
And the reason the point of detection is this low is due to masking, not a
raw inability to hear isolated sounds that high.
Just noise.
No, there's music up to 80-100 KHz, depending on the instrument. A trumpet
with a Harmon mute comes to mind.
If you can't hear a tone at 17khz, what makes you think you can
hear anything out at 50khz?