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Cards In This Set
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Sound waves are?
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A mechanical wave in which particles in a medium move. Sound travels in a stright line. Sound waves are longitudinal wave.
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Acoustic propagation properities are?
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The effects of the cound wave upon the biological tissue through which it passes.
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The acoustic variables?
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Pressure ( pascals), density (kg/cm^3), and distance (cm,mm)
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Acoustic parameters?
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Help describe the waves features.
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The 7 acoustic parameters?
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Period, frequency, amplitude, power, intensity, wavelegnth, propogation speed.
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Tranverse waves?
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Particles move in a direction that is perpendicular (right angles) to the direction that the wave popagates.(string shakeing up/down)
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Longitudinal waves?
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Particles move in the same direction that the wave propagates. (example sound).
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Inphase waves?
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Peaks occur at the same time and at the same location.
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Out of phase waves?
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Peaks occur at different times. (out of step).
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Interference?
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When multiple beans arrive at same location and the waves loose their individual characteristic at that moment to combine to form a single wave.
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Constrictive Interference?
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Intereferance of a pair of inphase waves results in the formation of a single wave of greater amplitude than either of its componets.
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Destructive Interference?
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Interference of a pair of out of phase waves resulting in the formation of a single wave of lesser amplitude than either of its componets.
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Parameters?
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Describe features of a sound wave.
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Period?
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Time it takes a wave to vibrate a single cycle/ time from start of one cycle to the start of the next cycle.
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Units of period?
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Untis of time: seconds, ms, hours, days.
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