Modified True/False
Indicate
whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
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1.
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Sound requires a medium. ____________________
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2.
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Sound will travel through water at 20°C faster than water at
80°C. ____________________
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3.
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The amount of energy a wave carries determines its amplitude.
____________________
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4.
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The unit used to measure sound intensity is the hertz.
____________________
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5.
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Loudness is how high or low a sound seems to be.
____________________
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6.
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When a listener moves toward the source of a sound wave, the compressions of the
wave are spread out. ____________________
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7.
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The frequency at which a string vibrates is its standing wave.
____________________
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8.
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The process of finding objects by emitting sounds and interpreting their
reflections is called reverberation. ____________________
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9.
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Ultrasound can be used to break up kidney stones.
____________________
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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10.
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Sound travels in a ____ wave.
a. | transverse | c. | surface | b. | compressional | d. | inverted |
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11.
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If the intensity of a sound decreases, the ____ decreases.
a. | wavelength | c. | spinal pitch | b. | speed | d. | loudness |
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12.
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The way your brain interprets the intensity of a sound is the ____.
a. | loudness | c. | frequency | b. | pitch | d. | amplitude |
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13.
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A sound intensity above ____ may cause permanent hearing damage.
a. | 0dB | c. | 120dB | b. | 90dB | d. | 150dB |
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14.
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For the Doppler effect to occur, ____.
a. | the sound source must be moving | b. | the listener must be moving | c. | both source and
listener must be moving | d. | either source or listener must be
moving |
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15.
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The differences among sounds of the same pitch and loudness is described as the
____ of the sound.
a. | quality | c. | fundamental frequency | b. | pitch | d. | resonance |
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16.
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Reverberation in concert halls is caused by ____ of sound.
a. | reflections | c. | refractions | b. | diffractions | d. | diffusions |
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17.
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Bats use ____ to navigate and find prey.
a. | infrasound | c. | the Doppler effect | b. | echolocation | d. | sonar |
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18.
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A system of using the reflection of underwater sound waves is ____.
a. | acoustics | c. | sonar | b. | radar | d. | resonance |
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19.
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A substance through which a wave can travel is a
a. | longitudinal wave. | c. | medium. | b. | vibration. | d. | rarefaction. |
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20.
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Which of the following is NOT a medium?
a. | a glass window | c. | a metal fork | b. | a vacuum | d. | the ocean |
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21.
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One thing you can do to protect your hearing is to
a. | sit in the back of the room during a rock concert. | b. | use earphones when
listening to the radio. | c. | eat a nutritious and balanced
diet. | d. | sleep in a darkened room. |
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22.
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What can a violinist do if one string is producing a sound that is too
low?
a. | lengthen the string | c. | attach the violin to an amplifier | b. | shorten the
string | d. | use a longer
bow |
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23.
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Which statement about sound is NOT true?
a. | Air particles travel with sound waves. | b. | Sound waves cannot travel through a
vacuum. | c. | Sound waves exist even if no one hears them. | d. | Air particles
vibrate along the path of a sound wave. |
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24.
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Which sound has the highest pitch?
a. | one with 156 Hz | c. | one with 14 dB | b. | one with 258 Hz | d. | one with 563 dB |
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Short Answer
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Figure
11-1
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25.
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Using Figure 11-1, name the part of the ear indicated by B and tell its
function.
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26.
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In Figure 11-1, identify the part of the ear indicated by D as the outer ear,
middle ear, or inner ear, then tell its function.
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27.
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Using Figure 11-1, identify the part of the ear indicated by C as the outer ear,
middle ear, or inner ear, then tell its function.
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28.
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Using Figure 11-1, identify the part of the ear indicated by A as the outer ear,
middle ear, or inner ear, then tell its function.
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Use the chart below to answer the following question.
Sound | Decibel level | | a soft whisper | 20 | | leaves rustling | 30 | | normal conversation | 60 | | automobile accelerating | 70 | | motorcycle engine | 110 | | rock concert | 120 | | jet plane taking off | 140 | | |
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29.
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What is a reasonable estimate of the range of decibel levels the human voice can
produce?
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Matching
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Match each item with the correct statement below. a. | sound wave | f. | overtones | b. | echolocation | g. | interference | c. | resonance | h. | woodwind instrument | d. | standing wave | i. | percussion instrument | e. | decibel | j. | tinnitus |
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30.
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vibrates when struck
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31.
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vibration that causes standing waves inside its air column
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32.
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the use of reflected sound waves to find food or other objects
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33.
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occurs when two instruments play the same note
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34.
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when the sound produced by one object causes another object to vibrate
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35.
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longitudinal wave caused by vibrations and carried through a medium
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36.
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a pattern of vibration that looks like a wave is at rest
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37.
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unit for measuring loudness
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38.
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results from long-term exposure to loud sounds
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39.
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frequencies two or more times the fundamental frequency
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