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Practice Test
  1.The intensity of sound is measured in units called __________ .  
  a.   reverberations  
  b.   dopplers  
  c.   decibels  
  d.   hertz  
  2.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Overtone  
  b.   Quality  
  c.   Reverberation  
  d.   Resonance  
  3.The change in pitch due to a moving wave source is called __________ .  
  a.   the compressional effect  
  b.   resonance  
  c.   the Doppler effect  
  d.   a rarefaction  
  4.The __________ is a spiral-shaped structure filled with liquid.  
  a.   hammer  
  b.   anvil  
  c.   cochlea  
  d.   stirrup  
  5.__________ is the amount of energy that flows through a certain area in a specific amount of time.  
  a.   Intensity  
  b.   Frequency  
  c.   Loudness  
  d.   Pitch  
  6.In the human ear, sound waves are gathered in the __________ .  
  a.   outer ear  
  b.   cochlea  
  c.   middle ear  
  d.   inner ear  
  7.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Ultrasonic  
  b.   Supersonic  
  c.   Subsonic  
  d.   Infrasonic  
  8.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Radar  
  b.   Sonar  
  c.   Ultrasound  
  d.   Echolocation  
  9.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and transmissions  
  b.   compressions and rarefactions  
  c.   vibrations and transmissions  
  d.   compressions and extensions  
  10.The human perception of sound frequency is __________ .  
  a.   loudness  
  b.   pitch  
  c.   resonance  
  d.   intensity  
  11.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   natural frequency  
  b.   quality  
  c.   pitch  
  d.   resonance  
  12.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 faster.  
  b.   As the temperature of a substance increases, sound waves in it move more slowly.  
  c.   As the temperature of a substance decreases, sound waves in it move faster.  
  d.   Temperature does not affect the speed of sound waves.  
  13.The study of sound is __________ .  
  a.   linguistics  
  b.   sonar  
  c.   acoustics  
  d.   ultrasonics  
  14.Which of the following will you hear as a high pitch?  
  a.   sound wave with intensity of 10 dB  
  b.   sound wave with frequency of 50 Hz  
  c.   sound wave with frequency of 10,000 Hz  
  d.   sound wave with intensity of 100 dB  
  15.Sounds are produced by __________ .  
  a.   frequencies  
  b.   reverberations  
  c.   pitch  
  d.   vibrations  
  16.What type of waves are sound waves?  
  a.   radio  
  b.   compressional  
  c.   sonar  
  d.   transverse  
  17.The matter through which all sound waves travel is called __________ .  
  a.   water  
  b.   atmosphere  
  c.   a medium  
  d.   air  
  18.The echoing effect produced by many reflections of sound is called __________ .  
  a.   rarefaction  
  b.   reverberation  
  c.   intensity  
  d.   resonance  
  19.Sound waves cannot travel in __________.  
  a.   solids  
  b.   gases  
  c.   liquids  
  d.   empty space  
  20.In which of the following mediums will sound travel fastest?  
  a.   brick  
  b.   water  
  c.   oil  
  d.   air  

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