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ch. 26 vocab
ch. 26 vocab for test
Question | Answer |
---|---|
pitch | frequency of sound |
infrasonic | sound waves with frequencies below 20Hz. |
ultrasonic | sound waves with frequencies above 20,000Hz. |
compression | pulse of compressed air. |
rarefaction | pulse of low-pressure air |
natural frequency | frequency at which an object vibrates when it's disturbed. |
forced vibration | when an object is made to vibrate by another vibrating object near by. |
resonance | phenomenon that occurs when the frequency of a vibration forced on an object matches the object's natural frenquency and adramatic increase in amplitude occurrs. |
beats | periodic variaiton in the loudness of sound. |