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Chp. 21 Vocab

Science-The Nature of Sound

QuestionAnswer
Sound Wave A longitudinal wave that is caused by vibrations and that travels through a material medium.
Medium A physical environment in which phenomena occur.
Pitch A measure of how high or low a sound is preceived to be, depending on the frequency of the sound wave.
Doppler Effect An observed change in the frequency of a wave when the source or observer is moving.
Loudness The extent to which a sound can be heard.
Decibel The most common unit used to measure loudness.
Echo A reflected sound wave.
Echolocation The process of using reflected sound waves to find objects; used by animals such as bats.
Interference The combination of two or more waves that results in a single wave.
Sonic Boom The explosive sound heard when a shock wave from an object traveling faster than the speed of sound reaches a person's ears.
Standing Wave A pattern of vibration that simulates a wave that is standing still.
Resonance A phenomenon that occurs when two objects naturally vibrate at the same frequency; the sound produced by one object causes the other object to vibrate.
Created by: sunshine3825
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