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pitch term that refers to how high or low sound frequencies appear to be
infrasonic term applied to sound pitch too low to be heard by the human ear, that is, below 20 Hz
ultrasonic term applied to sound frequencies above 20,000 Hz, the normal upper limit of human hearing
compression a pulse of compressed air (or other matter); opposite of rarefaction
rarefaction a disturbance in air (or matter) in which the pressure is lowered; opposite of compression
natural frequency a frequency at which an elastic object, once energized, will vibrate. minimum energy is required to continue vibration at that frequency. also called resonant frequency
forced vibration the vibration of an object that is made to vibrate by another vibrating object that is nearby. the sounding board in a musical instrument amplifies the sound through forced vibration
resonance a phenomenon that occurs when the frequency of forced vibrations on an object matches the object's natural frequency, and a dramatic increase in amplitude results
beats a periodic variation in the loudness of sound caused by interference when two tones of slightly different frequency are sounded together
Created by: distler
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