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28 Cards in this Set
- Front
- Back
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Sound is a ___ & ___ wave that cannot travel through ___ |
mechanical & longitudinal
vacuum |
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Molecules that are sqeezed together
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Compressed
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Molecules that are stretched apart
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Rarefied
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The acoustic effects of the medium upon the sound wave are called what?
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Acoustic Propagation Properties
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The effects of the sound wave upon the biologic tissue through which it passes
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Biologic Effects
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Concentration of force in an area? Units?
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Pressure / pascals (Pa)
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Concentration of mass in a volume? Units?
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Density / kg/cm
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Measure of particle motion? Units?
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Distance / cm
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The parameters used to describe the characteristics of a sound wave are called what?
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Acoustic Parameters
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In which type of wave do particles move in a direction that is perpendicular to the direction that the wave propagates
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Transverse Waves
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In which type of wave do particles move in the same direction that the wave propagates
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Longitudinal Waves
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When the peaks & troughs of a pair of waves occur at the same time and location, they are said to be what?
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In-Phase
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When the peaks & troughs of a pair of waves occur at different times, they are said to be what?
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Out-of-Phase
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When multiple waves arrive at an identical location at exactly the same time combining to form one wave
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Interference
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When multiple in-phase waves combine to form a single wave with greater amplitude than any of its components
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Constructive Interference
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When multiple out-of-phase waves combine to form a single wave of lesser amplitude than any of its components
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Destructive Interference
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Sound waves are identified by oscillations in what?
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Acoustic Variables
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Name the three acoustic variables which are used to distinguish between sound waves and other types of waves
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Pressure
Density Distance |
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When the frequencies of the sound waves differ, what unique type of interference occurs?
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Both Constructive & Deconstructive Interference (forming an oscillating waveform)
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What do waves transfer from one location to another?
A. matter B. molecules C. energy D. water |
C
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Which of the following best describes sound waves?
A. a series of compressions and rarefactions B. waves that are heard by man C. movement of molecules and energy from one location to another D. waves that are used to make images of anatomy |
A
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Variations in all of the following identify specific waves as acoustic waves except:
A. pressure B. parameters C. density D. acoustic variables |
B
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All of the following are true of sound waves except:
A. they are acoustic B. they are pressure waves C. they are transverse D. they move energy |
C
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All of the following are acoustic parameters except:
A. pressure B. period C. propagation speed D. frequency |
A
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Which of the following best describes sound wave?
A. transverse, pressure waves B. transverse, longitudinal waves C. longitudinal, out-of-phase waves D. longitudinal, pressure waves |
D
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Two waves are traveling in a medium and arrive at a location at the same time. What event takes place?
A. constructive interference B. destructive interference C. interference D. reflection |
C
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Which types of waves will exhibit both constructive and destructive interference?
A. waves of different amplitude B. a pair of longitudinal waves C. waves of different frequency D. out-of-phase waves |
C
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What units are used to report the pressure of a sound beam?
A. pounds B. centimeters C. pascals D. kg/cm |
C
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