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28 Cards in this Set
- Front
- Back
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the combining of waves travelling in the same medium at the same time:
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interference
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the point where a wave is in the cycle:
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phase
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a short burst of sound created by a transducer: |
pulse
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the time to complete one burst of sound (talking time only):
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pulse duration
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the distance through which sound propagates during the time it takes to complete one burst of sound (talking time only):
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spacial pulse length
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the time from the start of one burst of sound to the start of the next burst of sound (talking & listening time):
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pulse repetition period
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the number of pulses per second:
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pulse repetition frequency
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the percentage of time that sound is created by the transducer:
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duty factor
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a term that refers to a given space:
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spacial
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a term that refers to a given time:
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temporal
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the maximum amplitude:
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peak
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a mathematical calculation of a typical value:
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average
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the ability to produce a clear image:
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resolution
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the ability to distinguish miniscule parts of an image:
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detail resolution
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the ability to distinguish subtle differences in shades of gray:
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contrast resolution
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the ability to distinguish a rapidly changing image:
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temporal resolution
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the ability to distinguish reflectors, one behind the other:
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axial resolution
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the ability to distinguish reflectors, one beside the other:
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lateral resolution
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the ability to distinguish reflectors, one above the other:
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elevation resolution
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Detail resolution can be increased by:
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increasing the # of scan lines or decreasing pixel size (either increases the # of pixels)
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Contrast resolution can be increased by:
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increasing bit depth (# of bits / pixel)
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Temporal resolution can be increased by:
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increasing frame rate
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Axial resolution can be increased by:
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making SPL smaller
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Lateral resolution can be increased by:
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decreasing lateral beam width
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Elevation resolution can be increased by:
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decreasing elevation beam width
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Two waves are ________ when they remain at the same point in the cycle at the same time & place.
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in phase
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Two waves are ________ when they remain at different points in the cycle at the same time & place.
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out of phase
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