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5 Written questions

5 Matching questions

  1. interference
  2. which acoustic variables are used to distinguish between sound waves and other types of waves
  3. how does ultrasound work
  4. units of distance
  5. what is acoustic propagation
  1. a pressure, density, and distance
  2. b cm,mm
  3. c sound pulses through biologic tissue or media and reflections arising from structures in the body return to the xducer and are processed into images
  4. d the effects of the medium upon the sound wave (compression and rarefication)
  5. e when multiple beams arrive at an identical location at exactly the same time and thereby lose their individual characteristics and combine to form a single wave

5 Multiple choice questions

  1. all waves carry energy
  2. straight or longitudinal
  3. particles move in the same direction that the wave propagates
  4. a pair of waves are considered in phase when their peaks (maximum values) and troughs (minimum values) occur at the same time and in the same location
  5. sound is a mechanical longitudinal wave that moves by compression and rarefaction--particles in the medium vibrate back and forth from a fixed position

5 True/False questions

  1. what is constructive interferencethe interference of a pair of in phase waves forms a single wave of greater amplitude than either of its components--the resulting wave is larger than its components


  2. what happens to the molecules in a medium as sound waves pass through?straight or longitudinal


  3. how are sound waves identifiedoscillations in acoustic variables


  4. transverse waveparticles move in a direction that is perpendicular (at right angles) to the direction that the wave propagates


  5. units of densitykg/cm cubed


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