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ARCTIC OCEAN
ARCTIC REGIONS
HYDROPHONES
Acoustics
3
SOUND TRANSMISSION
3
UNDERWATER EXPLOSIONS
3
*UNDERWATER SOUND
2
ICE
2
Ice and Permafrost
2
LOW FREQUENCY
2
NOISE
2
Seismology
2
Snow
2
VELOCITY
2
*ACOUSTIC WAVES
1
*ICE
1
*PROJECTILES
1
*SEA ICE
1
*SEISMIC WAVES
1
*SEISMOMETERS
1
*SONAR ARRAYS
1
ACOUSTIC DATA
1
ACOUSTIC DETECTORS
1
ACOUSTIC PROPERTIES
1
ACOUSTIC REFRACTION
1
AIR DROP OPERATIONS
1
ALASKA
1
AMBIENT NOISE
1
AMPLITUDE
1
ANTISUBMARINE WARFARE
1
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