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THE TYPE OF SOUND WAVES
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Sound with frequency less than the lower limit of the audio range
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direction of displacement of this type of wave is perpendicular to the propagation
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is a medical technique currently used to obtain important information about pregnancy
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is the distance between two crests or troughs in a propagating wave
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is the nature of wave that does not propagate in vacuum
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is the unit of sound intensity level
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sound can not propagate in it.
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in sinosoidal sound waves, this quantity is directly proportional to the square of the amplitude.
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