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Practice Test
  1.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   ultrasound  
  b.   sonar  
  c.   radar  
  d.   echolocation  
  2.The matter through which all sound waves travel is called __________ .  
  a.   a medium  
  b.   air  
  c.   water  
  d.   atmosphere  
  3.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and transmissions  
  b.   compressions and extensions  
  c.   compressions and rarefactions  
  d.   vibrations and transmissions  
  4.A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.  
  a.   natural frequency  
  b.   resonant frequency  
  c.   reverberation  
  d.   overtone  
  5.Which of the following will you hear as a high pitch?  
  a.   sound wave with intensity of 100 dB  
  b.   sound wave with intensity of 10 dB  
  c.   sound wave with frequency of 50 Hz  
  d.   sound wave with frequency of 10,000 Hz  
  6.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.   Music has a wider range of frequencies than noise.  
  d.   It is strictly a matter of opinion.  
  7.The human perception of sound frequency is __________ .  
  a.   resonance  
  b.   intensity  
  c.   pitch  
  d.   loudness  
  8.In the human ear, sound waves are gathered in the __________ .  
  a.   outer ear  
  b.   inner ear  
  c.   middle ear  
  d.   cochlea  
  9.The intensity of sound is measured in units called __________ .  
  a.   hertz  
  b.   dopplers  
  c.   decibels  
  d.   reverberations  
  10.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   natural frequency  
  b.   resonance  
  c.   pitch  
  d.   quality  
  11.The study of sound is __________ .  
  a.   sonar  
  b.   ultrasonics  
  c.   linguistics  
  d.   acoustics  
  12.__________ is the amount of energy that flows through a certain area in a specific amount of time.  
  a.   Loudness  
  b.   Pitch  
  c.   Frequency  
  d.   Intensity  
  13.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  
  14.What type of waves are sound waves?  
  a.   compressional  
  b.   transverse  
  c.   radio  
  d.   sonar  
  15.What describes the differences among sounds of the same pitch and loudness?  
  a.   resonance  
  b.   overtone  
  c.   acoustics  
  d.   quality  
  16.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Ultrasonic  
  b.   Subsonic  
  c.   Supersonic  
  d.   Infrasonic  
  17.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Ultrasound  
  b.   Echolocation  
  c.   Radar  
  d.   Sonar  
  18.In which of the following mediums will sound travel fastest?  
  a.   air  
  b.   brick  
  c.   oil  
  d.   water  
  19.The __________ is a spiral-shaped structure filled with liquid.  
  a.   anvil  
  b.   stirrup  
  c.   cochlea  
  d.   hammer  
  20.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Resonance  
  b.   Quality  
  c.   Overtone  
  d.   Reverberation  

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