SPI Review Edelman Ultrasound
Physics
3 rules for powers of 10s ANS: positive exponents are >10
negative exponents are <10
0 exponent has a value between 1 and 10
what is the prefix, symbol and value for an exponent of 10^6 ANS: mega, M, 1,000,000
what is the prefix, symbol and value for an exponent of 10^3 ANS: kilo, k, 1,000
what is the value for an exponent of 10^0 ANS: 1
what is the prefix, symbol and value for an exponent of 10^-1 ANS: deci, d, 1/10
what is the prefix, symbol, and value for an exponent of 10^-2 ANS: centi, c, 1/100
what is the prefix, symbol, and value for an exponent of 10^-3 ANS: milli, m, 1/1000
what is the prefix, symbol and value for an exponent of 10^-6 ANS: micro, u, 1/1000000
All waves carry _______ from one location to another. ANS: energy
Sound is a __________ wave in which particles in the medium move. ANS: mechanical
Can sound travel through a vacuum? ANS: No. Sound must travel through matter and there is no matter
in vacuums.
,there are areas of ______ and ______ in a sound wave ANS: compression, rarefraction
in what way does sound travel? ANS: in a straight line
Sound waves are _____ waves. ANS: longitudinal
Acoustic propagation properties are? ANS: the effects of the medium upon the sound wave
Acoustic variables ANS: changes that occur within a medium as a result of sound traveling through that
medium
What are the 3 acoustic variables? ANS: Pressure (P), density (ρ), and distance (particle vibration)
what is the acoustic variable pressure ? ANS: concentration of force in an area
units: pascals (Pa)
what is the acoustic variable density? ANS: concentration of mass in a volume
units: kg/cm^3
what is the acoustic variable distance? ANS: measure of particle motion
units: cm, feet, mile
what does one of the acoustic variables have to do in order to be a sound wave? ANS: rhythmically
oscillate
,sound waves are also known as ____ waves ANS: acoustic
What are the 7 acoustic parameters? ANS: 1. Period
2. Frequency
3. Amplitude
4. Power
5. Intensity
6. Wavelength
7. Propagation speed
How do particles move in a transverse waves? ANS: perpendicular to the wave propagation
(ex: hold end of string and shake up and down)
how do particles move in longitudinal waves? ANS: in the same direction that the wave propagates.
sound is a longitudinal wave.
what are considered in-phase waves? ANS: a pair of waves that have their peaks at the same time and
same location
what are considered out-of-phase waves? ANS: a pair of waves that have their peaks at different points
and at different times
what kind of interference occurs with in-phase waves? ANS: constructive interference
, what kind of interference occurs with out-phase waves? ANS: destructive interference
what is interference (for sound)? ANS: when more than one sound beam travel in a medium and can
arrive at the same place at the same time. the waves then loose their individual characteristics and
combine to form a single wave.
when the frequency of different waves differ, _____________ interference occur ANS: both constrictive
and destructive
_____ describe the features of a sound wave ANS: parameters
what are the 7 parameters of sound? (CW) ANS: period, frequency, amplitude, power, intensity,
wavelength, speed
_____ is the time it takes a wave to vibrate a single cycle, or the time from the start of one cycle to the
start of the next ANS: period
what is period reported in? ANS: time (microseconds)
what is the typical value of a period? ANS: .06-.5 us (microseconds)
what is period determined by? ANS: determined by the sound source only, not the medium
Is period adjustable? ANS: -No. The sonographer cannot change the period while using a basic
ultrasound system with a particular transducer.
_____ is the number of particular events that occur in a specific duration of time. in ultrasound, this of a
wave is described as the number of cycles that occurs in one second ANS: frequency
Physics
3 rules for powers of 10s ANS: positive exponents are >10
negative exponents are <10
0 exponent has a value between 1 and 10
what is the prefix, symbol and value for an exponent of 10^6 ANS: mega, M, 1,000,000
what is the prefix, symbol and value for an exponent of 10^3 ANS: kilo, k, 1,000
what is the value for an exponent of 10^0 ANS: 1
what is the prefix, symbol and value for an exponent of 10^-1 ANS: deci, d, 1/10
what is the prefix, symbol, and value for an exponent of 10^-2 ANS: centi, c, 1/100
what is the prefix, symbol, and value for an exponent of 10^-3 ANS: milli, m, 1/1000
what is the prefix, symbol and value for an exponent of 10^-6 ANS: micro, u, 1/1000000
All waves carry _______ from one location to another. ANS: energy
Sound is a __________ wave in which particles in the medium move. ANS: mechanical
Can sound travel through a vacuum? ANS: No. Sound must travel through matter and there is no matter
in vacuums.
,there are areas of ______ and ______ in a sound wave ANS: compression, rarefraction
in what way does sound travel? ANS: in a straight line
Sound waves are _____ waves. ANS: longitudinal
Acoustic propagation properties are? ANS: the effects of the medium upon the sound wave
Acoustic variables ANS: changes that occur within a medium as a result of sound traveling through that
medium
What are the 3 acoustic variables? ANS: Pressure (P), density (ρ), and distance (particle vibration)
what is the acoustic variable pressure ? ANS: concentration of force in an area
units: pascals (Pa)
what is the acoustic variable density? ANS: concentration of mass in a volume
units: kg/cm^3
what is the acoustic variable distance? ANS: measure of particle motion
units: cm, feet, mile
what does one of the acoustic variables have to do in order to be a sound wave? ANS: rhythmically
oscillate
,sound waves are also known as ____ waves ANS: acoustic
What are the 7 acoustic parameters? ANS: 1. Period
2. Frequency
3. Amplitude
4. Power
5. Intensity
6. Wavelength
7. Propagation speed
How do particles move in a transverse waves? ANS: perpendicular to the wave propagation
(ex: hold end of string and shake up and down)
how do particles move in longitudinal waves? ANS: in the same direction that the wave propagates.
sound is a longitudinal wave.
what are considered in-phase waves? ANS: a pair of waves that have their peaks at the same time and
same location
what are considered out-of-phase waves? ANS: a pair of waves that have their peaks at different points
and at different times
what kind of interference occurs with in-phase waves? ANS: constructive interference
, what kind of interference occurs with out-phase waves? ANS: destructive interference
what is interference (for sound)? ANS: when more than one sound beam travel in a medium and can
arrive at the same place at the same time. the waves then loose their individual characteristics and
combine to form a single wave.
when the frequency of different waves differ, _____________ interference occur ANS: both constrictive
and destructive
_____ describe the features of a sound wave ANS: parameters
what are the 7 parameters of sound? (CW) ANS: period, frequency, amplitude, power, intensity,
wavelength, speed
_____ is the time it takes a wave to vibrate a single cycle, or the time from the start of one cycle to the
start of the next ANS: period
what is period reported in? ANS: time (microseconds)
what is the typical value of a period? ANS: .06-.5 us (microseconds)
what is period determined by? ANS: determined by the sound source only, not the medium
Is period adjustable? ANS: -No. The sonographer cannot change the period while using a basic
ultrasound system with a particular transducer.
_____ is the number of particular events that occur in a specific duration of time. in ultrasound, this of a
wave is described as the number of cycles that occurs in one second ANS: frequency
