звуковий промінь
sound ranging (artillery sound ranging)
cathode ray tube (CRT)
X - X-ray – XRAY
X-ray radiation
X-ray inspection
cosmic ray albedo
X-ray flаw detection
X-ray testing
ray
X-ray photon
gamma-ray photon
clock ray
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