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Practice Test
  1.The __________ is a spiral-shaped structure filled with liquid.  
  a.   hammer  
  b.   anvil  
  c.   cochlea  
  d.   stirrup  
  2.What is the difference between music and noise?  
  a.   Music follows a specified pattern of sounds and pitches; noise has no pattern.  
  b.   Noise has a greater intensity than music.  
  c.   It is strictly a matter of opinion.  
  d.   Music has a wider range of frequencies than noise.  
  3.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Quality  
  b.   Overtone  
  c.   Resonance  
  d.   Reverberation  
  4.A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.  
  a.   resonant frequency  
  b.   natural frequency  
  c.   reverberation  
  d.   overtone  
  5.The human perception of sound frequency is __________ .  
  a.   intensity  
  b.   loudness  
  c.   resonance  
  d.   pitch  
  6.Sounds are produced by __________ .  
  a.   reverberations  
  b.   vibrations  
  c.   frequencies  
  d.   pitch  
  7.The change in pitch due to a moving wave source is called __________ .  
  a.   a rarefaction  
  b.   resonance  
  c.   the Doppler effect  
  d.   the compressional effect  
  8.In the human ear, sound waves are gathered in the __________ .  
  a.   middle ear  
  b.   inner ear  
  c.   cochlea  
  d.   outer ear  
  9.The echoing effect produced by many reflections of sound is called __________ .  
  a.   rarefaction  
  b.   reverberation  
  c.   resonance  
  d.   intensity  
  10.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   natural frequency  
  b.   pitch  
  c.   resonance  
  d.   quality  
  11.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 decreases, sound waves in it move faster.  
  d.   As the temperature of a substance increases, sound waves in it move more slowly.  
  12.What type of waves are sound waves?  
  a.   compressional  
  b.   radio  
  c.   sonar  
  d.   transverse  
  13.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   echolocation  
  b.   radar  
  c.   sonar  
  d.   ultrasound  
  14.__________ is the amount of energy that flows through a certain area in a specific amount of time.  
  a.   Frequency  
  b.   Loudness  
  c.   Pitch  
  d.   Intensity  
  15.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Radar  
  b.   Ultrasound  
  c.   Sonar  
  d.   Echolocation  
  16.In which of the following mediums will sound travel fastest?  
  a.   oil  
  b.   water  
  c.   brick  
  d.   air  
  17.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Infrasonic  
  b.   Subsonic  
  c.   Supersonic  
  d.   Ultrasonic  
  18.The matter through which all sound waves travel is called __________ .  
  a.   a medium  
  b.   air  
  c.   water  
  d.   atmosphere  
  19.The intensity of sound is measured in units called __________ .  
  a.   dopplers  
  b.   reverberations  
  c.   decibels  
  d.   hertz  
  20.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and rarefactions  
  b.   compressions and extensions  
  c.   compressions and transmissions  
  d.   vibrations and transmissions  

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