Quiz Chapters 1-3
Sound waves transfer_____ from one location to another.
energy
Which of the following best describes sound waves?
a series of compressions and rarefactions
The period and frequency of the sound wave are?
inversely proportional
Variations in all of the following identify specific waves as acoustic waves except:
acoustic parameters
All of the following are true of sound waves except:
they are transverse
All of the following are acoustic parameters except:
pressure
Which of the following best describes sound waves?
longitudinal, pressure waves
A pair of waves are in phase. What occurs when these waves interfere?
constructive interference
The pressure of a sound beam is reported in units of:
pascals
Identify the wave that is ultrasonic?
5 MHz
Which of the following waves is ultrasonic and most useful in diagnostic sonography?
5 MHz
Which of the following waves has the shortest period?
2 MHz
The operating frequency of a sound wave is reported in units of:
hertz
Which of the following is not determined by the sonographer?
propagation speed
Which of the following characteristics will create the fastest speed of sound?
low density, high stiffness
What happens to the intensity if the area of the beam is doubled?
halved
What is the wavelength of a 5 MHz sound wave in soft tissue?
0.31 mm
Which of the following is considered an acoustic parameter?
frequency
Which of the following is considered an acoustic variable?
pressure
Which of the following is determined by the medium?
sound speed