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Key Terms

PhysicsKey Terms

the amount that matter is disrupted during a sound wave, as measured by the difference in height between the crests and troughs of the sound wave.
a phenomenon produced by the superposition of two waves with slightly different frequencies but the same amplitude
beat frequency
the frequency of the amplitude fluctuations of a wave
the reduction in amplitude over time as the energy of an oscillation dissipates
a unit used to describe sound intensity levels
Doppler effect
an alteration in the observed frequency of a sound due to relative motion between the source and the observer
the lowest-frequency resonance
the term used to refer to the fundamental and its overtones
the perception of sound
the perception of sound intensity
natural frequency
the frequency at which a system would oscillate if there were no driving and no damping forces
all resonant frequencies higher than the fundamental
the perception of the frequency of a sound
a low-pressure region in a sound wave
the phenomenon of driving a system with a frequency equal to the system's natural frequency
to drive a system at its natural frequency
sonic boom
a constructive interference of sound created by an object moving faster than sound
a disturbance of matter that is transmitted from its source outward by longitudinal waves
sound intensity
the power per unit area carried by a sound wave
sound intensity level
the level of sound relative to a fixed standard related to human hearing
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