ultrasound

• Ultrasound


  Sound waves with a frequency higher than the upper limit of human hearing (at least 20,000 Hertz)
• Using ultrasound to measure distance

  1. Emit ultrasound pulse

  2. Pulse reflects off target

  3. Detect reflected pulse

  4. Calculate distance from time taken
• Organs imaged using ultrasound

  • Kidney
  • Heart
  • Fetus
• Advantages of ultrasound over x-rays

  Ultrasound does not cause mutations and does not increase the risk of cancer
• Industrial uses of ultrasound

  • Detect hidden defects
  • Inspect welds
• Calculating distance using ultrasound

  1. Use equation: distance = speed x time

  2. Divide total distance by 2 to get depth
• Speed of ultrasound in water is 1600 meters per second