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Sorensen Chapter 26 Vocab
|term that refers to how high or low sound frequencies
|term applied to sound pitch too low to be heard by the human ear, that is, below 20 hertz.
|Term applied to sound frequencies above 20,000 hertz, the normal upper limit of human hearing.
|In mechanics, the act of squeezing material and reducing its volume. (b) In sound, a pulse of compressed air (or other matter); opposite of rarefaction.
|A disturbance in air (or matter) in which the pressure is lowered. Opposite of compression.
|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.
|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.
|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.
|A periodic variation in the loudness of sound caused by interference when two tones of slightly different frequencies are sounded together.