On 04/20/2011 10:48 PM, RichD wrote:
This may be a dumb question, I never studied acoustics....
If you look into the wrong end of a telescope,
everything looks reduced, 'anti-magnified'.
Is there anything analogous acoustically?
In both cases, the phenomena is described
by wave equations -
Rich,
The common telescope is a device that is "bidirectional", i.e., it "processes"
light both ways, and either end can be used as receiver or transmitter.
"Audio telescopes" are more likely to operate electronically and are
thus "unidirectional," so you don't have the ability to reverse
input and output function.
--
Randy Yates % "So now it's getting late,
Digital Signal Labs % and those who hesitate
% got no one..."
http://www.digitalsignallabs.com % 'Waterfall', *Face The Music*, ELO