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Practice Test
  1.What describes the differences among sounds of the same pitch and loudness?  
  a.   acoustics  
  b.   quality  
  c.   resonance  
  d.   overtone  
  2.In which of the following mediums will sound travel fastest?  
  a.   oil  
  b.   water  
  c.   brick  
  d.   air  
  3.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Infrasonic  
  b.   Ultrasonic  
  c.   Supersonic  
  d.   Subsonic  
  4.__________ is the amount of energy that flows through a certain area in a specific amount of time.  
  a.   Frequency  
  b.   Intensity  
  c.   Pitch  
  d.   Loudness  
  5.The intensity of sound is measured in units called __________ .  
  a.   reverberations  
  b.   hertz  
  c.   dopplers  
  d.   decibels  
  6.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  
  7.A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.  
  a.   natural frequency  
  b.   reverberation  
  c.   resonant frequency  
  d.   overtone  
  8.What type of waves are sound waves?  
  a.   compressional  
  b.   radio  
  c.   sonar  
  d.   transverse  
  9.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   sonar  
  b.   radar  
  c.   echolocation  
  d.   ultrasound  
  10.What is the difference between music and noise?  
  a.   Music has a wider range of frequencies than noise.  
  b.   It is strictly a matter of opinion.  
  c.   Noise has a greater intensity than music.  
  d.   Music follows a specified pattern of sounds and pitches; noise has no pattern.  
  11.Sounds are produced by __________ .  
  a.   reverberations  
  b.   vibrations  
  c.   frequencies  
  d.   pitch  
  12.In the human ear, sound waves are gathered in the __________ .  
  a.   cochlea  
  b.   middle ear  
  c.   outer ear  
  d.   inner ear  
  13.The echoing effect produced by many reflections of sound is called __________ .  
  a.   reverberation  
  b.   rarefaction  
  c.   intensity  
  d.   resonance  
  14.The human perception of sound intensity is __________ .  
  a.   frequency  
  b.   acoustics  
  c.   loudness  
  d.   pitch  
  15.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Reverberation  
  b.   Overtone  
  c.   Resonance  
  d.   Quality  
  16.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   natural frequency  
  b.   quality  
  c.   resonance  
  d.   pitch  
  17.How does temperature of a medium affect the speed of sound waves?  
  a.   As the temperature of a substance decreases, 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 faster.  
  d.   As the temperature of a substance increases, sound waves in it move more slowly.  
  18.Sound waves cannot travel in __________.  
  a.   gases  
  b.   empty space  
  c.   solids  
  d.   liquids  
  19.The study of sound is __________ .  
  a.   ultrasonics  
  b.   linguistics  
  c.   acoustics  
  d.   sonar  
  20.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Radar  
  b.   Ultrasound  
  c.   Echolocation  
  d.   Sonar  

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