[AZ-Observing] Leonid sounds
- From: John-Cathy Matthews <john-cathy@xxxxxxxx>
- To: "az-observing@xxxxxxxxxxxxx" <az-observing@xxxxxxxxxxxxx>
- Date: Thu, 29 Nov 2001 15:26:45 -0700
After reading some of the Leonid observation reports on this list
recently -- specifically with regard to "sounds" (actually heard or just
imagined etc.), I was delighted to find two excellent references to
Electrophonic sound. Sounds, which seem to be produced by ionization
events such as meteor trails and aurora. And the interesting
observation, that if the human ear is really able to "hear" VLF and EMP
events, you would hear the "sizzle" from a 60 mile high meteor trail
with a delay of only about 367 microseconds (real time, for all
practical purposes), as opposed to the 6 minute delay of an actual
"acoustic wave". If you are interested, check the following two URLs.
http://www.qrz.com/article.pl?sid=01/11/29/107228&mode=nocomment
and
http://science.nasa.gov/headlines/y2001/ast26nov_1.htm
The NASA site, in particular, has a wealth of links at the bottom for
those interested more information on this topic.
John Matthews
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