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Acoustics
Of or pertaining to the study of mechanical waves in all stages of matter including sounds, vibration, ultrasounds, and infrasound.
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Acoustics
Doppler effect
Physics; Acoustics
The change in the frequency of light or sound waves that occurs when the source of the sound or light is moving toward or away from the person.
echolocation
Physics; Acoustics
A system in some animals, such as bats and dolphins, for locating objects using sound waves.