The B & K 4939 records out to 100kHz.
http://www.bksv.com/pdf/Bp1851.pdf. but the highest freq critter on
the planet is the blind Ganges dolphin (Plantanista gangetica); a
voice around 356kHz at last count. Freqs of this altitude have
typically, in the past, been recorded with what's called
instrumentation recorders (analog systems developed by Ampex for the
Navy). They record at 120 ips for those of us who still remember
those days and were terribly noisy and a large pain in the butt to
handle. That's how we recorded the tree cavitating at 70kHz a few
years back. The transducer was a B & K 4103 hydrophone placed in the
trunk of the tree which caught the tiny cells of the xylem and phloem
popping.
Bernie
>The high-freq. mic discussion makes me wonder what recorder we are going t=
o
>use for these high freqs, since most these days are limited to about the
>human hearing range...
>
>Doug
>***************************************
>Doug Von Gausig
>Digitally Recorded Birds Sounds at:
>http://naturesongs.com/birds.html
>Clarkdale, Central Arizona, USA
>34=B046.34N 112=B003.25W
>e-mail:
>***************************************
>
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>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
--
Wild Sanctuary, Inc.
P. O. Box 536
Glen Ellen, California 95442-0536
Tel: (707) 996-6677
Fax: (707) 996-0280
http://www.wildsanctuary.com
[Non-text portions of this message have been removed]
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