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

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