30 
@------= LF GROANS 
O-———20C/S SHORT PULSES 
we —_ GROWL (S) 
fon) 
oO 
S 
oO 
PERCENT OF SAMPLES 
DO 
oO 
NUMBER OF SAMPLES 
=) INS ee, RW aD —~ oO 
12 gl4 16 18 = 20 22 24 2 4 6 8 10 12 
HOUR OF SAMPLE 
IPR OG PA Mo Dire al Tau mt Dut wom (CUTAVIES Oka ASOT as 
with little diurnal patterning, basied on the 
number of hourly samples in which @ particular 
sound was heard, regardless of how many times 
within a@ sample it was repeated. Although the 
Low Frequency Groans and 20 c/s Short Pulses were 
characteristically of low count per sample, they 
were well distributed throughout the samples. 
The distributions of 20 c/s Long Pulses and Bark- 
BOG FOL CSSCHEEGLLY On cee LOO Greene LURE Os 
the graph. The curves for 20 c/s Pulses and Low 
Frequency Groans are based upon presence of @ 
sound in either the deep or shallow hydrophone or 
both. The Growl sound was heard only from the 
shallow hydrophone. 
