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

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