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sound propagation distance
sound ranging (artillery sound ranging)
shock wave propagation
wave electromagnetic propagation logging
speed of wave propagation
electromagnetic wave propagation
noise propagation
propagation of pressure
propagation
electric properties of object and propagation medium for electromagnetic waves
radio propagation data
radio propagation prediction
clicking sound
communications by sound
high-intensity sound
sonar (sound navigation and ranging)
sound communication
sound wave
sound-absorbent tile
stun grenade / flash grenade / flashbang / thunderflash / sound bomb
artillery sound reconnaissance
supersonic speed (exceeds speed of sound / Mach 1)
sound damping
aerial sound ranging
air registration point (in sound ranging)
high-frequency sound waves
sound-proof compartment
background sound pressure level
overall sound pressure level
adjusted slope of sound pressure level
atmospheric sound absorption
change in slope of sound pressure level