SPI EXAM STUDY GUIDE Edelman-
ULTRAsound Physics 1-3/24
QUESTIONS WITH ACCURATE
ANSWERS
Chapter 1-3 Basics, Sound, & Describing Sound Waves - ANSWERS
Power of 10 Metric System - ANSWERS10^9 Giga (G) billion
10^6 Mega (M) million
10^3 kilo (k) thousand
10^2 hecto (h) hundred
10^1 deca (da) ten
10^-1 deci (d) tenTH
10^-2 centi (c) hundredTH
10^-3 milli (m) thousandTH
10^-6 micro (µ) millionTH
10^-9 nano (n) billionTH
Power of 10 Complementary Metric Units - ANSWERSGiga/nano
Mega/micro
kilo/milli
hecto/centi
deca/deci
Interference - ANSWERSThe combination of two or more waves that results in a single
wave
In-Phase Waves/ Constructive Interference - ANSWERSPeaks / troughs occur at the
sane time and place.
Resulting wave is larger than either single wave.
Out-of-Phase Waves/ Destructive Interference - ANSWERSPeaks / troughs occur at
different times.
Resulting wave is smaller than either single wave.
When two out-of-phase waves are equal amplitude, complete destructive interference
occurs resulting in no wave form.
Interference of Waves with Different Frequencies - ANSWERSWhen the frequencies of
the waves differ, both constructive and destructive interference occur.
, Sound (Pt. 1) - ANSWERSA type of wave that carries energy from one place to another
place.
Sound is created by - ANSWERSThe vibration of a moving object
Sound waves are comprised of - ANSWERSCompressions (increase in
pressure/density) and Rarefactions (decrease in pressure/density)
Sound waves cannot travel through - ANSWERSA vacuum. They must travel through a
medium.
Sound is a ___ type of wave - ANSWERSMechanical and Longitudinal wave
Sound travels in a ___ line - ANSWERSStraight
Acoustic variables (Pt. 2) - ANSWERSIDENTIFY sound waves. When an acoustic
variable changes in time, a wave is present.
3 Types of Acoustic Variables are: - ANSWERSPressure: Concentration of FORCE
within an AREA. (Pascals [Pa])
Density: Concentration of MASS within a VOLUME. ( kg/ cm^3)
Distance: Measure of PARTICLE MOTION (cm, ft, mi)
Waves (Pt. 3) Transverse - ANSWERSTransverse waves: Particles move in a
perpendicular direction (at right angles) to the direction of the wave
Waves (Pt. 3) Longitudinal - ANSWERSParticles move in the same direction as the
wave
7 Parameters of sound waves - ANSWERSDESCRIBE the particular features of sound
waves
Period Parameter definition (Pt. 4) - ANSWERSThe TIME to complete ONE single
cycle. The time from the START of ONE cycle to the START of another cycle.
Period Parameter Units - ANSWERSmicroseconds, seconds, hours,- all units of TIME
Period Parameter determined by/ changed by sonographer - ANSWERSSound source;
no
Frequency Parameter definition (Pt. 5) - ANSWERSThe number of CERTAIN EVENTS
that occur in a particular time duration. The NUMBER of cycles that occur in ONE
SECOND.
Frequency Parameter Unit - ANSWERSper second, 1/ second, Herts, Hz
ULTRAsound Physics 1-3/24
QUESTIONS WITH ACCURATE
ANSWERS
Chapter 1-3 Basics, Sound, & Describing Sound Waves - ANSWERS
Power of 10 Metric System - ANSWERS10^9 Giga (G) billion
10^6 Mega (M) million
10^3 kilo (k) thousand
10^2 hecto (h) hundred
10^1 deca (da) ten
10^-1 deci (d) tenTH
10^-2 centi (c) hundredTH
10^-3 milli (m) thousandTH
10^-6 micro (µ) millionTH
10^-9 nano (n) billionTH
Power of 10 Complementary Metric Units - ANSWERSGiga/nano
Mega/micro
kilo/milli
hecto/centi
deca/deci
Interference - ANSWERSThe combination of two or more waves that results in a single
wave
In-Phase Waves/ Constructive Interference - ANSWERSPeaks / troughs occur at the
sane time and place.
Resulting wave is larger than either single wave.
Out-of-Phase Waves/ Destructive Interference - ANSWERSPeaks / troughs occur at
different times.
Resulting wave is smaller than either single wave.
When two out-of-phase waves are equal amplitude, complete destructive interference
occurs resulting in no wave form.
Interference of Waves with Different Frequencies - ANSWERSWhen the frequencies of
the waves differ, both constructive and destructive interference occur.
, Sound (Pt. 1) - ANSWERSA type of wave that carries energy from one place to another
place.
Sound is created by - ANSWERSThe vibration of a moving object
Sound waves are comprised of - ANSWERSCompressions (increase in
pressure/density) and Rarefactions (decrease in pressure/density)
Sound waves cannot travel through - ANSWERSA vacuum. They must travel through a
medium.
Sound is a ___ type of wave - ANSWERSMechanical and Longitudinal wave
Sound travels in a ___ line - ANSWERSStraight
Acoustic variables (Pt. 2) - ANSWERSIDENTIFY sound waves. When an acoustic
variable changes in time, a wave is present.
3 Types of Acoustic Variables are: - ANSWERSPressure: Concentration of FORCE
within an AREA. (Pascals [Pa])
Density: Concentration of MASS within a VOLUME. ( kg/ cm^3)
Distance: Measure of PARTICLE MOTION (cm, ft, mi)
Waves (Pt. 3) Transverse - ANSWERSTransverse waves: Particles move in a
perpendicular direction (at right angles) to the direction of the wave
Waves (Pt. 3) Longitudinal - ANSWERSParticles move in the same direction as the
wave
7 Parameters of sound waves - ANSWERSDESCRIBE the particular features of sound
waves
Period Parameter definition (Pt. 4) - ANSWERSThe TIME to complete ONE single
cycle. The time from the START of ONE cycle to the START of another cycle.
Period Parameter Units - ANSWERSmicroseconds, seconds, hours,- all units of TIME
Period Parameter determined by/ changed by sonographer - ANSWERSSound source;
no
Frequency Parameter definition (Pt. 5) - ANSWERSThe number of CERTAIN EVENTS
that occur in a particular time duration. The NUMBER of cycles that occur in ONE
SECOND.
Frequency Parameter Unit - ANSWERSper second, 1/ second, Herts, Hz
