NOSCrptProjCOMBO_1980
NOSCrptProjCOMBO_1980
NOSCrptProjCOMBO_1980
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(Tb.fa ii09e fa 'e9NFIDENT1Ab<br />
4'£CUA1TY Cl.ASSIFICATIOlf OF THIS PAGE (Wit.,, Dere Enl•rN)<br />
REPORT DOCUMENTATION PAGE<br />
READ INSTRUCTIONS<br />
BEFORE COMPLETINC FORM<br />
12~ GOVT AC:C:ESSIOlf lfO. J. AEC:1P1ENT"S·C:ATAL.OG lfUMBElll<br />
'tfl:]> -c 0 'l:1 3 lJ:;, -<br />
. i<br />
WC CUMMINGS, RL SEELEY. PO THOMPSON, RA JOHNSON<br />
t. PUtFOAMING OAGANIZATIOlf lfAME AND ADDREt;<br />
Naval Ocean Systems Center, Hawaii Laboratory<br />
P. 0. Box 997 ·<br />
K.ailua, Hawaii 96734<br />
11, CO!tTROl.l.ll'iG OFFICt: 1tAME ANO ADDRESS .--<br />
Naval Sea Systems Command (NSEA 63R33) . ;.: ij~ .<br />
Department of the Navy ·-~ :'. . . ·<br />
Washin1ton, D. C. 20362<br />
If. CISTAIBUTION STA TENEN T (ol 1/lle RflflJotl)<br />
1.,. C:ONT!lM:l'.011 &11,jll~T lfUlllBER(•)<br />
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IZ. REPORT CATE<br />
July <strong>1980</strong><br />
II. NUN8EA OF PAGES<br />
44<br />
II. SECURITY Cl.ASS. (ol 1111• r•portJ<br />
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1la. Ol:Cl.AS$1FIC:6!.10""'00W!!ll"RAl)J.ll,R<br />
SC:NEDULt: .1115. a••T. "1Y7<br />
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17. OISTAllUTION STATEMENT (al flte ••tre1:1 •fend /rt Bloclr 20, II dlll•1•I ,_ R•oHJ<br />
II. SUPPLEMENTARY NOTES<br />
It. KEV WORDS (Contln11• °",.,.., .. •Id• II neu••_,. Md ldMlll)- lit)• l)/o"lr n-Ht).<br />
Bandwidth Large Whales Pinnipeds<br />
Bioacoustics Low-Data Rate Signal-to-noise Ratio<br />
Communications Marine Mammals Signal Synthesis<br />
Covert Measure Format Small Whales<br />
Source Levels<br />
Sutimarine<br />
Transducers<br />
Waterfall Display<br />
Whistles<br />
IACS -,, Pilot Whale Sonogram<br />
ZO. A8STR~T (Conrlr"a "" r•.,•••• •Ille It n•ceH_,. •d ,,,_,,,,_ "" blacll ,._._,, j<br />
(C) Prc,cct COMBO produced the elements of a covert communications system that conveys coded messages<br />
using selected marine animal sounds in a natural sound environment. Project progress includes development of a coding<br />
teer -.ique. a ~omputer program for elemental synthesis, and a recognizer/decoder instrument that is compatible witb<br />
fleet low-data•rate communications. equipment. The report also discusses. properties of available transducers and !<br />
characteristics of marine animal sounds as possible elements of covert communication systems.<br />
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OD<br />
FOIUI<br />
1 JAN 7.1 1473
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