ULTRASOUND PHYSICS SPI REVIEW
COMPREHENSIVE STUDY GUIDE 2026
QUESTIONS WITH ANSWERS GRADED A+
⩥ amplified. Answer: strengthened
⩥ deibel notation. Answer: standard measurement tool used to report the
strength of the wave
⩥ A number that represents the number of 10s that are multiplied to
create the original number. Answer: log
⩥ A simple way to determine the logarithm of an even power of ten is to.
Answer: count zeros
⩥ _____ is the common unit for measuring the strength of sound beams.
Answer: Decibel, dB
⩥ decibel notation is. Answer: logarithmic
⩥ Decibel notation does not measure absolute numbers, but reports
________ __________. Answer: relative changes
,⩥ Decibel notation is. Answer: a relative measurement,
a comparison,
a ration,
and logarithmic
⩥ decibels require two __________. Answer: intensities
⩥ the two intensities are the ________ and the ________ level at the
time of measurement. Answer: reference, or starting point, and the actual
level
⩥ positive decibels report signals that are. Answer: increasing
⩥ when a wave's intensity doubles, the relative change is. Answer: +3
decibels
⩥ when a wave's intensity increases 10-fold, the relative change is.
Answer: +10 decibels
⩥ Negative decibels describe signals that are ___________ in strength.
Answer: decreasing
⩥ when the intensity is reduced to half its original value, the relative
change is. Answer: -3 decibels
, ⩥ when the intensity is reduced to 1/10 its original value, the relative
change is. Answer: -10 decibels
⩥ As sound travels in the body, it weakens or ____________________.
Answer: ATTENUATES
⩥ After a sound wave is received by the transducer, converted into
electricity and returned to the ultrasound system, it is strengthened or
________________. Answer: AMPLIFIED
⩥ Decibel Notation. Answer: A standard measurement tool used to
report changes in attenuation or amplification
- Does not measure absolute numbers, rather RELATIVE CHANGES
- LOGARITHMIC
⩥ Decibels (dB). Answer: - are a way of quantifying/measuring:
1. the STRENGTH of sound beams as they travel through the body
2. the electrical SIGNAL strength
3. the BRIGHTNESS of images
COMPREHENSIVE STUDY GUIDE 2026
QUESTIONS WITH ANSWERS GRADED A+
⩥ amplified. Answer: strengthened
⩥ deibel notation. Answer: standard measurement tool used to report the
strength of the wave
⩥ A number that represents the number of 10s that are multiplied to
create the original number. Answer: log
⩥ A simple way to determine the logarithm of an even power of ten is to.
Answer: count zeros
⩥ _____ is the common unit for measuring the strength of sound beams.
Answer: Decibel, dB
⩥ decibel notation is. Answer: logarithmic
⩥ Decibel notation does not measure absolute numbers, but reports
________ __________. Answer: relative changes
,⩥ Decibel notation is. Answer: a relative measurement,
a comparison,
a ration,
and logarithmic
⩥ decibels require two __________. Answer: intensities
⩥ the two intensities are the ________ and the ________ level at the
time of measurement. Answer: reference, or starting point, and the actual
level
⩥ positive decibels report signals that are. Answer: increasing
⩥ when a wave's intensity doubles, the relative change is. Answer: +3
decibels
⩥ when a wave's intensity increases 10-fold, the relative change is.
Answer: +10 decibels
⩥ Negative decibels describe signals that are ___________ in strength.
Answer: decreasing
⩥ when the intensity is reduced to half its original value, the relative
change is. Answer: -3 decibels
, ⩥ when the intensity is reduced to 1/10 its original value, the relative
change is. Answer: -10 decibels
⩥ As sound travels in the body, it weakens or ____________________.
Answer: ATTENUATES
⩥ After a sound wave is received by the transducer, converted into
electricity and returned to the ultrasound system, it is strengthened or
________________. Answer: AMPLIFIED
⩥ Decibel Notation. Answer: A standard measurement tool used to
report changes in attenuation or amplification
- Does not measure absolute numbers, rather RELATIVE CHANGES
- LOGARITHMIC
⩥ Decibels (dB). Answer: - are a way of quantifying/measuring:
1. the STRENGTH of sound beams as they travel through the body
2. the electrical SIGNAL strength
3. the BRIGHTNESS of images
