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| form of energy that travels as waves |
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| rapid back-and-forth movement |
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| wave in which the particles of the medium move back and forth in the direction of the wave motion |
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| material through which mechanical waves can travel |
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| faster than the speed of sound for that medium |
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| loud noise caused by breaking the sound barrier |
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| amount of energy in a sound wave |
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| unit used to measure the intensity of loudness of a sound |
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| how high or low a sound is |
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| sound above 20,000 Hz frequency |
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| sound below 20 Hz frequency |
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| lowest pitched sound produced when an object vibrates |
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| sounds that have a higher pitch than the fundamental tone |
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| a pleasing combustion of sounds |
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| unpleasant combinations of sound with irregular patterns of vibration |
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| apparent change in the frequency of waves |
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| one of the five human senses |
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| sense organ that detects sound |
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| thin sheet of tissue that vibrates when sound waves strike it |
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| organ that changes sound vibrations into nerve signals |
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