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10 Cards in this Set
- Front
- Back
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What are the units of :
wavelength frequency intensity propagation speed period power |
mm
Hz Watts/cm2 m/s second watts |
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Does the medium or the sound source determine these parameters?
wavelength frequency intensity propagation spped period power |
both
sound sound medium sound sound |
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Using a particular ultrasound system, which of the following cannot be changed by the operator?
wavelength amplitude intensity propagation speed period power t |
cannot
can can cannot cannot can |
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Describe sound
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Mechanical, longitudinal wave
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What is a wave with a frequency of 15,000 MHz called?
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Ultrasonic
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The power in a beam is 1 watt and the area is 5cm2. What is the beam's intensity?
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0.2 Wcm2
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If intensity remains the same while the power is doubled, what happens to beam area?
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doubled
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A sound beam travels a total of 10cm in 2 seconds. What is the speed of the sound in this medium?
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5 cm/sec
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What are the acoustic variables?
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density,particle motion and pressure
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The effects of ultrasound upon tissue are called?
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bioeffects
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