Ch. 3 Review ~ Describing Sound Waves

Description

Describing Sound Waves
Dawn Hubbard
Quiz by Dawn Hubbard, updated more than 1 year ago
Dawn Hubbard
Created by Dawn Hubbard over 6 years ago
10
1

Resource summary

Question 1

Question
What are the units of measure for: 1. Wavelength = [blank_start]millimeters[blank_end] 2. Frequency = [blank_start]Hertz[blank_end] 3. Intensity = [blank_start]Watts/cm(2)[blank_end] 4. Propagation speed = [blank_start]meters/second[blank_end] 5. Period = [blank_start]second[blank_end] 6. Power = [blank_start]Watts[blank_end]
Answer
  • millimeters
  • Hertz
  • Watts/cm(2)
  • meters/second
  • second
  • Watts

Question 2

Question
Does the medium or sound source determine these parameters? 1. wavelength [blank_start]Sound Source[blank_end] 2. frequency [blank_start]Sound Source[blank_end] 3. intensity (initial) [blank_start]Sound Source[blank_end] 4. propagation speed [blank_start]Sound Source[blank_end] 5. period [blank_start]Sound Source[blank_end] 6. power (initial) [blank_start]Sound Source[blank_end] 7. amplitude (initial) [blank_start]Sound Source[blank_end]
Answer
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both
  • Sound Source
  • Medium
  • Both

Question 3

Question
Using a particular ultrasound system and transducer, which of the following cannot be changed by the operator? 1. wavelength [blank_start]Can[blank_end] 2. frequency [blank_start]Can[blank_end] 3. intensity [blank_start]Can[blank_end] 4. propagation speed [blank_start]Can[blank_end] 5. period [blank_start]Can[blank_end] 6. power [blank_start]Can[blank_end] 7. amplitude (initial) [blank_start]Can[blank_end]
Answer
  • Can
  • Cannot
  • Can
  • Cannot
  • Can
  • Cannot
  • Can
  • Cannot
  • Can
  • Cannot
  • Can
  • Cannot
  • Can
  • Cannot

Question 4

Question
A wave with a frequency of 15,000 MHz is ultrasonic.
Answer
  • True
  • False

Question 5

Question
If the amplitude of a wave is increased to 3 times its original value, the intensity is increased by 6 times.
Answer
  • True
  • False

Question 6

Question
Which of the following best describes the line identified by the letter A?
Answer
  • amplitude
  • period
  • frequency
  • wavelength
  • peak-to-peak amplitude

Question 7

Question
Which of the following best describes the line identified by the letter B?
Answer
  • amplitude
  • peak-to-peak amplitude
  • frequency
  • wavelength
  • none of the above

Question 8

Question
Which of the following best describes the line identified by the letter C?
Answer
  • amplitude
  • peak-to-peak amplitude
  • frequency
  • wavelength
  • none of the above

Question 9

Question
Which of the lines is most likely to be the reciprocal of frequency?
Answer
  • A
  • B
  • C
  • D

Question 10

Question
Which of the following best describes the line identified by the letter D?
Answer
  • amplitude
  • peak-to-peak amplitude
  • frequency
  • wavelength
  • none of the above

Question 11

Question
Which of the following best describes the line identified by the letter D?
Answer
  • amplitude
  • peak-to-peak amplitude
  • frequency
  • period
  • none of the above

Question 12

Question
Which of the lines is most likely to be determined by the source and the medium?
Answer
  • A
  • B
  • C

Question 13

Question
If the power of a wave is halved, the intensity is reduced to one-fourth its original value.
Answer
  • True
  • False

Question 14

Question
Medium 1 has a density of 9 and a stiffness of 6. Medium 2 has a density of 8 and a stiffness of 6. In which medium will sound travel slower?
Answer
  • Medium 1
  • Medium 2

Question 15

Question
Which of the following characteristics will create the fastest speed of sound?
Answer
  • high density, high stiffness
  • low density, high stiffness
  • high density, low stiffness
  • low density, low stiffness

Question 16

Question
Propagation speed increases as frequency increases.
Answer
  • True
  • False

Question 17

Question
Which of the following characteristics will create the fastest speed of sound?
Answer
  • High density, high stiffness
  • Low density, high stiffness
  • High density, low stiffness
  • Low density, low stiffness

Question 18

Question
If the power in a beam is 1 watt and the area is 5 cm(2), what is the beam's intensity?
Answer
  • 5 W/cm(2)
  • 1 W/cm(2)
  • 0.2 W/cm(2)
  • 1 watt

Question 19

Question
If the intensity remains the same while the power is doubled, what has happened to the beam area?
Answer
  • quadrupled
  • doubled
  • halved
  • unchanged

Question 20

Question
A sound beam travels a total of 10 cm in 2 seconds. What is the speed of the sound?
Answer
  • 10 cm/sec
  • 2 cm/sec
  • 5 cm/sec
  • 0.2 cm/sec

Question 21

Question
Propagation speed increases as frequency increases.
Answer
  • True
  • False

Question 22

Question
Propagation speed increases as frequency decreases.
Answer
  • True
  • False

Question 23

Question
Propagation speed does not change as frequency increases.
Answer
  • True
  • False

Question 24

Question
What is the wavelength of 3 MHz sound in soft tissue?
Answer
  • 0.51 m
  • 0.51 km
  • 0.51 mm
  • 0.51 nm
  • 0.51 micrometers

Question 25

Question
What is the wavelength of a wave with an unknown frequency traveling in soft tissue?
Answer
  • 0.51 microseconds
  • 0.51 m/s
  • 0.51 pascals
  • 0.51 watts
  • 0.51 mm

Question 26

Question
What is the wavelength of 2 MHz sound in soft tissue?
Answer
  • 1.54 mm
  • 0.77 mm
  • 0.51 mm
  • 1.54 km/s
  • 3.08 mm

Question 27

Question
The effects of sound waves on tissue in the body are called [blank_start]Bioeffects[blank_end].
Answer
  • Bioeffects

Question 28

Question
Which of the following are considered acoustic variables? (More than one answer could be correct)
Answer
  • frequency
  • density
  • particle motion
  • temperature
  • period
  • pressure

Question 29

Question
Which of the following are considered acoustic parameters? (More than one answer could be correct)
Answer
  • frequency
  • density
  • distance
  • pressure
  • period

Question 30

Question
The effects of tissue on sound waves are called [blank_start]Acoustic propagation properties[blank_end].
Answer
  • Acoustic propagation properties

Question 31

Question
The effects of medium on an ultrasound wave are called [blank_start]Acoustic propagation properties[blank_end]
Answer
  • Acoustic propagation properties

Question 32

Question
How are the following parameters related? [blank_start]Directly Related[blank_end] - frequency and period [blank_start]Directly Related[blank_end] - amplitude and power [blank_start]Directly Related[blank_end] - amplitude and intensity [blank_start]Directly Related[blank_end] - power and intensity [blank_start]Directly Related[blank_end] - wavelength and intensity [blank_start]Directly Related[blank_end] - wavelength and frequency [blank_start]Directly Related[blank_end] - acoustic velocity and density [blank_start]Directly Related[blank_end] - elasticity and speed of sound [blank_start]Directly Related[blank_end] - acoustic velocity and compressibility [blank_start]Directly Related[blank_end] - stiffness and sound speed [blank_start]Directly Related[blank_end] - frequency and sound speed [blank_start]Directly Related[blank_end] - frequency and intensity [blank_start]Directly Related[blank_end] - power and frequency
Answer
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
  • directly related
  • inversely related
  • unrelated
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