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Practice Test
  1.In which of the following mediums will sound travel fastest?  
  a.   brick  
  b.   water  
  c.   oil  
  d.   air  
  2.Sound waves cannot travel in __________.  
  a.   liquids  
  b.   gases  
  c.   empty space  
  d.   solids  
  3.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Sonar  
  b.   Radar  
  c.   Echolocation  
  d.   Ultrasound  
  4.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Supersonic  
  b.   Subsonic  
  c.   Ultrasonic  
  d.   Infrasonic  
  5.A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.  
  a.   overtone  
  b.   natural frequency  
  c.   reverberation  
  d.   resonant frequency  
  6.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   sonar  
  b.   ultrasound  
  c.   radar  
  d.   echolocation  
  7.In the human ear, sound waves are gathered in the __________ .  
  a.   cochlea  
  b.   inner ear  
  c.   middle ear  
  d.   outer ear  
  8.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   pitch  
  b.   quality  
  c.   resonance  
  d.   natural frequency  
  9.The study of sound is __________ .  
  a.   acoustics  
  b.   linguistics  
  c.   sonar  
  d.   ultrasonics  
  10.The intensity of sound is measured in units called __________ .  
  a.   hertz  
  b.   reverberations  
  c.   decibels  
  d.   dopplers  
  11.The echoing effect produced by many reflections of sound is called __________ .  
  a.   reverberation  
  b.   intensity  
  c.   rarefaction  
  d.   resonance  
  12.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and transmissions  
  b.   compressions and extensions  
  c.   compressions and rarefactions  
  d.   vibrations and transmissions  
  13.The human perception of sound frequency is __________ .  
  a.   loudness  
  b.   pitch  
  c.   resonance  
  d.   intensity  
  14.The change in pitch due to a moving wave source is called __________ .  
  a.   resonance  
  b.   a rarefaction  
  c.   the compressional effect  
  d.   the Doppler effect  
  15.The __________ is a spiral-shaped structure filled with liquid.  
  a.   anvil  
  b.   hammer  
  c.   stirrup  
  d.   cochlea  
  16.The matter through which all sound waves travel is called __________ .  
  a.   a medium  
  b.   water  
  c.   atmosphere  
  d.   air  
  17.How does temperature of a medium affect the speed of sound waves?  
  a.   As the temperature of a substance increases, sound waves in it move more slowly.  
  b.   As the temperature of a substance increases, sound waves in it move faster.  
  c.   As the temperature of a substance decreases, sound waves in it move faster.  
  d.   Temperature does not affect the speed of sound waves.  
  18.The human perception of sound intensity is __________ .  
  a.   acoustics  
  b.   frequency  
  c.   pitch  
  d.   loudness  
  19.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Reverberation  
  b.   Quality  
  c.   Resonance  
  d.   Overtone  
  20.What describes the differences among sounds of the same pitch and loudness?  
  a.   acoustics  
  b.   overtone  
  c.   resonance  
  d.   quality  

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