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5 Written Questions

5 Matching Questions

  1. what does sound need to travel
  2. in phase waves
  3. how does ultrasound work
  4. transverse wave
  5. longitudinal wave
  1. a sound pulses through biologic tissue or media and reflections arising from structures in the body return to the xducer and are processed into images
  2. b sound must travel through a medium, it cannot travel through a vacuum
  3. c particles move in a direction that is perpendicular (at right angles) to the direction that the wave propagates
  4. d particles move in the same direction that the wave propagates
  5. e 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 Multiple Choice Questions

  1. the 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. sound is a mechanical longitudinal wave that moves by compression and rarefaction--particles in the medium vibrate back and forth from a fixed position
  3. straight or longitudinal
  4. that wave is a sound wave
  5. there are 7 acoustic parameters: period, frequency, amplitude, power, intensity, wavelength, propagation speed----wif papp

5 True/False Questions

  1. how are sound waves identifiedsound must travel through a medium, it cannot travel through a vacuum


  2. destructive interferencethe resultant wave is smaller (of lesser amplitude) than either one of its components


  3. units of distancepascals (Pa)


  4. which acoustic variables are used to distinguish between sound waves and other types of wavespressure, density, and distance


  5. if something other than pressure, density, or distance has a rhythmic oscillation thenthat wave is a sound wave


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