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Re: Underwater latency (not completely OT) ;-)
Blue Whales sing in frq ranges below human hearing and communicate over
vast distances."Blue whales emit very loud, highly structured, repetitive
low-frequency sounds that can travel form many miles underwater. They are
probably the loudest animals alive, louder than a jet engine"
Nat Geo story on Fin whale songs-around 20 hz
"Each note in the song lasts only a second and sounds like a "gentle
burp,"
said Clark. Then there is a 14-second pause before the fin whale hits the
next note. The entire song lasts about eight to ten minutes. Only when the
composition is played at about 60 times its actual speed is the rhythm and
pitch variation apparent. Blue whale songs can last up to twenty minutes
with a two-minute interval between notes."
<http://news.nationalgeographic.com/news/2002/06/0619_020619_TVwhale.html>
fish tapes inc. freq ranges
http://www.fishecology.org/soniferous/soundposter.htm