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Practice Test
  1.__________ is the ability of a medium to vibrate by absorbing energy at its natural frequency.  
  a.   Resonance  
  b.   Reverberation  
  c.   Quality  
  d.   Overtone  
  2.The human perception of sound frequency is __________ .  
  a.   intensity  
  b.   resonance  
  c.   pitch  
  d.   loudness  
  3.The two types of regions that make up compressional waves are __________ .  
  a.   compressions and extensions  
  b.   compressions and rarefactions  
  c.   compressions and transmissions  
  d.   vibrations and transmissions  
  4.Sounds are produced by __________ .  
  a.   pitch  
  b.   frequencies  
  c.   reverberations  
  d.   vibrations  
  5.The __________ is the frequency at which a material tends to vibrate when it is disturbed.  
  a.   pitch  
  b.   natural frequency  
  c.   quality  
  d.   resonance  
  6.The echoing effect produced by many reflections of sound is called __________ .  
  a.   intensity  
  b.   rarefaction  
  c.   reverberation  
  d.   resonance  
  7.In which of the following mediums will sound travel fastest?  
  a.   oil  
  b.   water  
  c.   brick  
  d.   air  
  8.The human perception of sound intensity is __________ .  
  a.   loudness  
  b.   frequency  
  c.   acoustics  
  d.   pitch  
  9.A(n) __________ is a vibration whose frequency is a multiple of the fundamental frequency.  
  a.   reverberation  
  b.   overtone  
  c.   resonant frequency  
  d.   natural frequency  
  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 more slowly.  
  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 decreases, sound waves in it move faster.  
  11.What is the difference between music and noise?  
  a.   Music follows a specified pattern of sounds and pitches; noise has no pattern.  
  b.   Music has a wider range of frequencies than noise.  
  c.   It is strictly a matter of opinion.  
  d.   Noise has a greater intensity than music.  
  12.__________ is a system that uses the reflection of underwater sound waves to detect objects.  
  a.   Ultrasound  
  b.   Sonar  
  c.   Echolocation  
  d.   Radar  
  13.__________ is the amount of energy that flows through a certain area in a specific amount of time.  
  a.   Intensity  
  b.   Frequency  
  c.   Loudness  
  d.   Pitch  
  14.The intensity of sound is measured in units called __________ .  
  a.   dopplers  
  b.   hertz  
  c.   reverberations  
  d.   decibels  
  15.Which of the following will you hear as a high pitch?  
  a.   sound wave with frequency of 50 Hz  
  b.   sound wave with intensity of 10 dB  
  c.   sound wave with frequency of 10,000 Hz  
  d.   sound wave with intensity of 100 dB  
  16.__________ waves are sound frequencies above 20,000 Hz.  
  a.   Infrasonic  
  b.   Ultrasonic  
  c.   Subsonic  
  d.   Supersonic  
  17.The process of locating objects by emitting sounds and interpreting the reflected sound waves is __________ .  
  a.   ultrasound  
  b.   sonar  
  c.   echolocation  
  d.   radar  
  18.In the human ear, sound waves are gathered in the __________ .  
  a.   middle ear  
  b.   inner ear  
  c.   outer ear  
  d.   cochlea  
  19.The study of sound is __________ .  
  a.   linguistics  
  b.   ultrasonics  
  c.   acoustics  
  d.   sonar  
  20.What describes the differences among sounds of the same pitch and loudness?  
  a.   quality  
  b.   acoustics  
  c.   resonance  
  d.   overtone  

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