Physics-Unit1-Sound
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| vibration | a periodic wiggle in time
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| wave | a periodic wiggle in time and space
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| mechanical wave | wave that requires a medium to travel through
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| electromagnetic wave | wave that does not require a medium to travel through
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| period | the time required for one complete cycle
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| amplitude | the maximum displacement on either side of the equilibrium (mid-point or home) position
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| wavelength | distance between successive troughs, crests or identical portions of a wave
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| frequency | number of crests that pass a particular point in a given time
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| hertz | unit of measurement for frequency. 1 hertz = 1 vibration per second
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| wave speed | speed at which waves pass a particular point
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| transverse wave | wave with vibration at right angle to the direction of the wave, example - light waves
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| longitudinal wave | wave in which the particles in the medium vibrate back and forth in the direction the wave travels, example - sound
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| interference pattern | pattern formed by the overlapping of two or more waves that arrive in a region at the same time
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| destructive interference | when the crest of one wave overlaps the trough of another way and the amplitude of the resulting wave amplitudes are smaller or zero
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| constructive interference | when the crests of two waves line up together resulting a higher amplitude
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| standing wave | stationary wave pattern formed in a medium when two sets of identical waves pass through the medium in opposite directions. The wave appears not to be traveling.
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| doppler effect | change in the frequency of a wave due to the motion of the source or the receiver.
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| blue shift | an increase in frequency(toward the blue end of spectrum)
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| red shift | a decrease in frequency (toward the red end of the spectrum)
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| bow wave | V-shaped wave produced by an object moving on a liquid surface faster than the wave speed
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| shock wave | cone shaped wave produced by an object moving a supersonic speed through a fluid
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| sonic boom | loud sound resulting from the incidence of a shock wave
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| pitch | the highness or lowness of a tone related to wave frequency
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| infrasonic | sound too low to be heard by humans, waves with a frequency below 20 hertz
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| ultrasonic | sound too high to be heard by humans, waves with a frequency above 20,000 hertz
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| compression | condensed region of the medium through which a longitudinal wave travels
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| rarefaction | rarefied (reduced pressure) area of the medium through which a longitudinal wave travels
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| reverberation | persistance of sound, as in an echo, due to multiple reflections
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| refraction | bending of sound or any wave caused by a difference in wave speeds
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| forced vibration | the setting up of vibrations in an object by a vibrating force
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| natural frequency | a frequency at which an elastic object naturally tends to vibrate if it is disturbed and the disturbaing force is removed
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| resonance | the response of a body when a forcing frequency matches its natural frequency
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| interference | a result of superposing different waves, often of the same wavelength; can be constructive or destructive
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| beats | a series of alternate reinforcements and cancellations produced by the interference of two waves of slightly different frequencies, heard as a throbbing effect in sound waves
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| acoustics | the study of sound properties
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Created by:
lpgullett
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