Chapter 1-3 quiz Flashcards
All of them are acoustic parameters except: Pressure Period Propagation speed Frequency
Pressure
Which of the following best describes sound waves? Transverse, pressure waves Transverse, longitudinal waves Longitudinal, out-of-phase waves Longitudinal, pressure waves
Longitudinal, pressure waves
What units are used to report the pressure of a sound beam?
Pascals
Which of the following waves is infrasonic? 4 MHz 400 KHz 28 Hz 2 Hz
2 Hz
Which of these waves are used in diagnostic sonography? 400 MHz 4 MHz 2 Khz 200,000 Hz
4 MHz
Which of the following waves has the longest period? 2 MHz 4000 Hz 6 Hz 1 Khz
6 Hz
Of the four waves whose periods are listed below, which has the lowest frequency? 8 s 80 micro sec 8 Ms 800 ks
8 s
If the amplitude of a wave is increased to 3 times its original value, the intensity is increased by ___ times.
9
T or F. Propagation speed increases as frequency increases
False
What is the wavelength of a wave with an unknown frequency traveling in soft tissues?
0.51 mm
Which of the following characteristics will create the fastest speed of sound?
Low density, high stiffness
Which type of waves will exhibit both constructive and destructive interference?
Waves of different frequency
What is the name of the horizontal axis of a graph?
X axis
Sound can be characterized as
Cyclical oscillations in certain variables
The sonographer does not have the ability to change the period of an ultrasound wave that is produced by a basic transducer
True
