PRESSURE 
PORT 
OUTPUT 
TRANSDUCER 
FIG. 3. End Plate With Reflected Sound 
+t 
. 1,498 uM yeect 1,500 M/SEC 
AS a 
“1,490 M/sec 
hector we 
i1g°2g'42" Ww 
SoSGiGs Nuns RSS 
: a MARCH 1961 
i a a | 
HSTHSGG PARRA 
BARES AG SSR SS 
1,000 METERS 
a awe FIG. 4. Sound Velocity vs. Depth, Outer 
wy Santa Barbara Channel. 
170 
