1|Page
Ultrasound Physics (DMS 206)
Questions with Detailed Verified
Answers Graded A+
Unrelated Ans: Two items not associated
Directly proportional Ans: Two items that are associated such that when on
item increases, the other increases
Proportional Ans: Two items that are associated but the relationship is not
specified
ex: weight is related to dieting
Inversely proportional Ans: Two items are associated such that when one item
increases the other decreases
Reciprocal Ans: 2 -> 1/2
Period x frequency = 1
10^9 Ans: Giga
G
Billion
10^6 Ans: Mega
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M
Million
10^3 Ans: Kilo
k
Thousand
10^2 Ans: Hecto
h
Hundred
10^1 Ans: Deca
da
Ten
10^-1 Ans: Deci
d
tenth
10^-2 Ans: Centi
c
Hundredth
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10^-3 Ans: Milli
m
Thousandth
10^-6 Ans: Micro
u
Millionth
10^-9 Ans: nano
n
Billionth
Acoustic propagation properties Ans: The effects of the medium upon the
sound wave
Biologic effects Ans: The effects of the sound wave upon the biologic tissue
through which it passes
Acoustic variables Ans: Pressure: concentration of force in an area (pascals,
Pa)
Density: concentration of mass in a volume (kg/cm^3)
Distance: measure of particle motion (cm, ft, mile)
Acoustic parameters Ans: Period, frequency, amplitude, power, intensity,
wavelength, propagation speed
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Transverse wave Ans: Particles move in a direction that is perpendicular
Longitudinal wave Ans: Particles move in the same direction that the wave
propagates (compressions & rarefactions)
In-phase Ans: When peaks (max) occur at the the same time and the same
location
Out-of-phase Ans: Their peaks occur at different times
Interface Ans: When multiple waves lose their individual characteristics at the
moment and combine to form a single wave
Happens with in-phase and out-phase
Constructive interference Ans: In-phase: results in the formation of single
wave with greater amplitude
Destructive interference Ans: Out-of-phase: results in the formation of a
single wave of lesser amplitude
Constructive destructive interference Ans: When waves of different
frequencies combine both occur
Acoustic variables allow us to determine which waves are sound waves and
which are not. Ans: True
Acoustic parameters are used to describe the features of sound waves. Ans:
True
Period Ans: The time it takes to vibrate a single cycle
Ultrasound Physics (DMS 206)
Questions with Detailed Verified
Answers Graded A+
Unrelated Ans: Two items not associated
Directly proportional Ans: Two items that are associated such that when on
item increases, the other increases
Proportional Ans: Two items that are associated but the relationship is not
specified
ex: weight is related to dieting
Inversely proportional Ans: Two items are associated such that when one item
increases the other decreases
Reciprocal Ans: 2 -> 1/2
Period x frequency = 1
10^9 Ans: Giga
G
Billion
10^6 Ans: Mega
,2|Page
M
Million
10^3 Ans: Kilo
k
Thousand
10^2 Ans: Hecto
h
Hundred
10^1 Ans: Deca
da
Ten
10^-1 Ans: Deci
d
tenth
10^-2 Ans: Centi
c
Hundredth
,3|Page
10^-3 Ans: Milli
m
Thousandth
10^-6 Ans: Micro
u
Millionth
10^-9 Ans: nano
n
Billionth
Acoustic propagation properties Ans: The effects of the medium upon the
sound wave
Biologic effects Ans: The effects of the sound wave upon the biologic tissue
through which it passes
Acoustic variables Ans: Pressure: concentration of force in an area (pascals,
Pa)
Density: concentration of mass in a volume (kg/cm^3)
Distance: measure of particle motion (cm, ft, mile)
Acoustic parameters Ans: Period, frequency, amplitude, power, intensity,
wavelength, propagation speed
, 4|Page
Transverse wave Ans: Particles move in a direction that is perpendicular
Longitudinal wave Ans: Particles move in the same direction that the wave
propagates (compressions & rarefactions)
In-phase Ans: When peaks (max) occur at the the same time and the same
location
Out-of-phase Ans: Their peaks occur at different times
Interface Ans: When multiple waves lose their individual characteristics at the
moment and combine to form a single wave
Happens with in-phase and out-phase
Constructive interference Ans: In-phase: results in the formation of single
wave with greater amplitude
Destructive interference Ans: Out-of-phase: results in the formation of a
single wave of lesser amplitude
Constructive destructive interference Ans: When waves of different
frequencies combine both occur
Acoustic variables allow us to determine which waves are sound waves and
which are not. Ans: True
Acoustic parameters are used to describe the features of sound waves. Ans:
True
Period Ans: The time it takes to vibrate a single cycle
