Regions of lower pressure and density are called ________.
A) compressions
B) rarefactions
C) longitudinal waves
D) acoustic variables
Correct Answer:
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Q9: The fraction of time that pulsed ultrasound
Q10: _ are the even and odd multiples
Q11: All of the following are acoustic variables
Q12: Pulse repetition frequency (PRF) refers to the
Q13: Wavelength is the _ over which one
Q15: The rate at which energy passes through
Q16: Doppler ultrasound pulses are typically _ cycles
Q17: If frequency increases,each cycle (period) _.
A) increases
B)
Q18: The following are all ultrasound frequencies except:
A)
Q19: Propagation speed is the speed at which
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