ARDMS SPI Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A
ARDMS SPI Exam (Latest 2023/ 2024
Update) Questions and Verified Answers|
100% Correct| Grade A
Q: What does rarefied mean?
Answer:
Stretched apart
Q: Sound travels in a line.
Answer:
Straight
Q: Sound waves are __ waves.
Answer:
Longitudinal
Q: What is the propagation speed dependent on?
Answer:
The medium
Q: Are there any biologic effects on tissue?
Answer:
No
Q: Sound waves are identified by
Answer:
Oscillations in acoustic variables
Q: What are the three acoustic variables? (With their units)
Answer:
pressure – pascals (Pa), density – kg/cm^3, distance – cm, mm
Q: If something other than pressure, density, or distance (particle motion) rhythmically
oscillates in a wave, then the wave…
Answer:
Is not a sound wave
Q: Sound waves are also known as
Answer:
Acoustic waves
Q: What are the seven Acoustic Parameters?
Answer:
Period, frequency, amplitude, power, intensity, wavelength, propagation speed
Q: Particles move in a direction that is perpendicular to the direction that the wave propagates
in what wave?
Answer:
Transverse wave
Q: Particles move in the same direction that the wave propagates in a __ wave.
Answer:
Longitudinal
Q: When are a pair of waves considered in-phase?
Answer:
When their peaks and troughs occur at the same time and at the same location
Considered “in step”
Q: What happens when two waves are out-of-phase?
Answer:
Their peaks occur at different times, and so do their troughs
“out of step”
Q: What is interference?
Answer:
When more than one beam travels in a medium and arrive at the same location at exactly the
same time
These waves lose their individual characteristics and combine to form a single wave
Q: The interference of in-phase waves results in a single wave of amplitude. This is
called __.
Answer:
Greater, constructive interference
(Larger Wave)
Q: The interference of a pair of out-of-phase waves results in the formation of a single wave of
_ amplitude. This combination is called _____________.
Answer:
Lesser, destructive interference
(Smaller Wave)
Q: When frequencies of waves differ, what kind of wave occurs?
Answer:
Both constructive and destructive interference
Q: What do waves transfer from one location to another?
Answer:
Energy
Q: Two waves are traveling in a medium and arrive at a location at the same time. What event
takes place?
Answer:
Interference
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Sound pulses created by a transducer travel through biologic tissue called…
All sound waves carry what from one location to another?
Different forms of waves include…
heat, sound, magnetic, and light
Sound is a __________ wave in which particles in the medium move.
molecules are alternately ___ and ____.
compressed (squeezed together) and rarefied (stretched apart).
sound travels in a straight or wavy line?
Are sound waves longitudinal or transverse?
Acoustic propagation properties
the effects of the medium upon the sound wave
the effects of the sound wave upon the biologic tissue through which it passes
Sound waves are identified by __________.
oscillations in acoustic variables.
pressure, density, (distance)particle motion
the acoustic variables are used to distinguish between…..
sound waves and other types of waves.
Sound waves are also known as…
concentration of force in an area
units of acoustic variable pressure
concentration of mass in a volume
units of acoustic variable density
units of acoustic variable distance
acoustic parameters are used to…
Accurately describe the characteristics of a sound wave
seven acoustic parameters include…
period, frequency, amplitude, power, intensity, wavelength, propagation speed
in a transverse wave particles move…
in a direction that is perpendicular to the direction that the wave propagates.
in-phase waves are _____ _____, just like the members of a synchronized marching band.
When two waves are _____ their peaks occur at different times, and so do their troughs.
in interference the waves lose their individual ______ and combine to form a _____ ____.
True or False: Both in-phase and out-of-phase wave pairs undergo interference.
Constructive/destructive interference
what do waves transfer from one location to another?
A. a series of compressions and rarefactions
D. Longitudinal, pressure waves
Which types of waves will exhibit both constructive and destructive interference?
waves of different frequencies
what units are used to report the pressure of a sound beam?
True or False? Acoustic parameters are used to describe the features of sound waves.