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25 Cards in this Set
- Front
- Back
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The extent of displacement from the equilibrium position. |
Amplitude |
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Rhythmic increases and decreases of volume from constructive and destructive interference. |
Beat |
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A complete vibration. |
Cycle |
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Scale of the intensity of sound from the threshold of human hearing. |
Decibel scale |
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Apparent shift in the frequency of sound due to the relative motion between the source and observer. |
Doppler effect |
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A reflected sound that can be distinguished from the original sound. |
Echo |
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The number of cycles of a wave or vibration occurring in one second. |
Frequency |
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The lowest frequency that can set up standing waves in an air column or on a string. |
Fundamental frequency |
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Unit of frequency. |
Hertz |
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Frequencies less than 20 Hz. |
Infrasonic |
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Mechanical disturbance that travels in the same direction as the wave. |
Longitudinal wave |
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The time required for one complete wave. |
Period |
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The frequency of a sound wave. |
Pitch |
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The change when light or sound wave bounce backward off a boundary. |
Reflection |
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A change in the direction of travel of a sound or light wave crossing a boundary. |
Refraction |
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When the frequency of an external force matches the natural frequency and standing waves are set. |
Resonance |
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Apparent increase in volume caused by reflection. |
Reverberation |
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A large intense wave disturbance of very high pressure. |
Shock wave |
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Sound wave that pile up into a shock wave when the source meets or exceeds the speed of sound. |
Sonic boom |
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When wavers of the same frequency establish regions of maximum and zero displacements. |
Standing wave |
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A mechanical disturbance that causer particles to move perpendicular to the direction of the wave. |
Transverse wave |
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Frequencies above 20,000 Hz |
Ultrasonic |
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A back and fourth motion that repeats itself. |
Vibration |
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Horizontal disturbance between wave crest. |
Wavelength |
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A disturbance or oscillation that moves through a medium. |
Waves |
