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Practice Test
  1.The intensity of sound is measured in units called __________ .  
  a.   hertz  
  b.   decibels  
  c.   dopplers  
  d.   reverberations  
  2.What type of waves are sound waves?  
  a.   compressional  
  b.   transverse  
  c.   sonar  
  d.   radio  
  3.In which of the following mediums will sound travel fastest?  
  a.   air  
  b.   oil  
  c.   brick  
  d.   water  
  4.Sounds are produced by __________ .  
  a.   vibrations  
  b.   frequencies  
  c.   reverberations  
  d.   pitch  
  5.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Resonance  
  b.   Reverberation  
  c.   Overtone  
  d.   Quality  
  6.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Supersonic  
  b.   Infrasonic  
  c.   Subsonic  
  d.   Ultrasonic  
  7.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.   Temperature does not affect the speed of sound waves.  
  c.   As the temperature of a substance increases, sound waves in it move more slowly.  
  d.   As the temperature of a substance decreases, sound waves in it move faster.  
  8.The __________ is a spiral-shaped structure filled with liquid.  
  a.   hammer  
  b.   stirrup  
  c.   cochlea  
  d.   anvil  
  9.The matter through which all sound waves travel is called __________ .  
  a.   air  
  b.   a medium  
  c.   water  
  d.   atmosphere  
  10.In the human ear, sound waves are gathered in the __________ .  
  a.   outer ear  
  b.   inner ear  
  c.   middle ear  
  d.   cochlea  
  11.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Echolocation  
  b.   Radar  
  c.   Ultrasound  
  d.   Sonar  
  12.The human perception of sound intensity is __________ .  
  a.   frequency  
  b.   acoustics  
  c.   loudness  
  d.   pitch  
  13.What is the difference between music and noise?  
  a.   Noise has a greater intensity than music.  
  b.   Music has a wider range of frequencies than noise.  
  c.   It is strictly a matter of opinion.  
  d.   Music follows a specified pattern of sounds and pitches; noise has no pattern.  
  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.Sound waves cannot travel in __________.  
  a.   liquids  
  b.   empty space  
  c.   solids  
  d.   gases  
  16.What describes the differences among sounds of the same pitch and loudness?  
  a.   overtone  
  b.   resonance  
  c.   quality  
  d.   acoustics  
  17.The human perception of sound frequency is __________ .  
  a.   resonance  
  b.   pitch  
  c.   loudness  
  d.   intensity  
  18.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   sonar  
  b.   ultrasound  
  c.   echolocation  
  d.   radar  
  19.The study of sound is __________ .  
  a.   linguistics  
  b.   ultrasonics  
  c.   sonar  
  d.   acoustics  
  20.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and transmissions  
  b.   vibrations and transmissions  
  c.   compressions and rarefactions  
  d.   compressions and extensions  

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