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Gallo ch 26 vocab

QuestionAnswer
term that refers to how high or low sound frequencies appear to be. pitch
term appiled to sound pitch too low to be heard by the human ear, that is, below 20 Hertz. infrasonic
term appiled to sound frequencies about 20,000 hertz, the normal upper limit of human hearing. ultrasonic
in mechanics, the act of squeezing material and reducing its volume; in sound, a pulse of compressed air )or other matter) opposite or rarefaction. compression
a disturbance in air (or matter) in which the pressure is lowered. Opposite of compression. rarefaction.
a frequency at which an elastic object, once energized, will vibrate. Minimum energy is required to continue vibartion at the frequency. also called resonant frequency. natural frequency
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 that sound through forced vibration. forced vibration
a phenomenon that occurs when the frequency of forced vibrations on an object matches the objects natural frequency, and a dramatic increase in amplitude results. resonance
a periodic variation in the loudness of sound caused by interference when two tones of slightly different frequencies are sounded together. beats
Created by: GalloRM