Accurate Real Exam Questions and Verified Co
This document contains a full set of authentic, up-to-date questions and verified
answers for the Edelman SPI 2025 Comprehensive Exam, aligned with the 2025–2026
testing cycle. It covers key ultrasound concepts such as wave physics, Doppler imaging,
resolution, artifacts, and system operation based on Edelman’s curriculum. Essential for
students using Edelman resources to prepare for the ARDMS SPI exam.
3 rules for powers of 10s - <<answer>>>..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 -
<<answer>>>..mega, M, 1,000,000
what is the prefix, symbol and value for an exponent of 10^3 -
<<answer>>>..kilo, k, 1,000
what is the value for an exponent of 10^0 - <<answer>>>..1
what is the prefix, symbol and value for an exponent of 10^-1 -
<<answer>>>..deci, d, 1/10
what is the prefix, symbol, and value for an exponent of 10^-2 -
<<answer>>>..centi, c, 1/100
what is the prefix, symbol, and value for an exponent of 10^-3 -
<<answer>>>..milli, m, 1/1000
,what is the prefix, symbol and value for an exponent of 10^-6 -
<<answer>>>..micro, u, 1/1000000
All waves carry _______ from one location to another. -
<<answer>>>..energy
Sound is a __________ wave in which particles in the medium move. -
<<answer>>>..mechanical
Can sound travel through a vacuum? - <<answer>>>..No. Sound must
travel through matter and there is no matter in vacuums.
there are areas of ______ and ______ in a sound wave -
<<answer>>>..compression, rarefraction
in what way does sound travel? - <<answer>>>..in a straight line
Sound waves are _____ waves. - <<answer>>>..longitudinal
Acoustic propagation properties are? - <<answer>>>..the effects of the
medium upon the sound wave
Acoustic variables - <<answer>>>..changes that occur within a medium
as a result of sound traveling through that medium
What are the 3 acoustic variables? - <<answer>>>..Pressure (P), density
(ρ), and distance (particle vibration)
what is the acoustic variable pressure ? - <<answer>>>..concentration
of force in an area
units: pascals (Pa)
what is the acoustic variable density? - <<answer>>>..concentration of
mass in a volume
units: kg/cm^3
,what is the acoustic variable distance? - <<answer>>>..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? - <<answer>>>..rhythmically oscillate
sound waves are also known as ____ waves - <<answer>>>..acoustic
What are the 7 acoustic parameters? - <<answer>>>..1. Period
2. Frequency
3. Amplitude
4. Power
5. Intensity
6. Wavelength
7. Propagation speed
How do particles move in a transverse waves? -
<<answer>>>..perpendicular to the wave propagation
(ex: hold end of string and shake up and down)
how do particles move in longitudinal waves? - <<answer>>>..in the
same direction that the wave propagates.
sound is a longitudinal wave.
what are considered in-phase waves? - <<answer>>>..a pair of waves
that have their peaks at the same time and same location
what are considered out-of-phase waves? - <<answer>>>..a pair of
waves that have their peaks at different points and at different times
, what kind of interference occurs with in-phase waves? -
<<answer>>>..constructive interference
what kind of interference occurs with out-phase waves? -
<<answer>>>..destructive interference
what is interference (for sound)? - <<answer>>>..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 - <<answer>>>..both constrictive and destructive
_____ describe the features of a sound wave -
<<answer>>>..parameters
what are the 7 parameters of sound? (CW) - <<answer>>>..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 - <<answer>>>..period
what is period reported in? - <<answer>>>..time (microseconds)
what is the typical value of a period? - <<answer>>>...06-.5 us
(microseconds)
what is period determined by? - <<answer>>>..determined by the sound
source only, not the medium
Is period adjustable? - <<answer>>>..-No. The sonographer cannot
change the period while using a basic ultrasound system with a
particular transducer.