Interference by two identical ultrasonic transmitters

螢幕截圖 2016-04-05 15.26.01

Item no.: P2151915

Principle

Ultrasonic waves of the same frequency, amplitude and direction of propagation are generated by two sources of sound positioned parallel to each other. The sources can vibrate both in-phase and out of-phase. The angular distribution of the intensity of the waves, which interfere with each other, is automatically recorded using a motor-driven, swivel ultrasound detector and a PC.

Tasks

  1. Determine the angular distribution of two sources of ultrasound vibrating in phase.
  2. Determine the angular positions of the interference minima and compare the values found with those theoretically expected.
  3. Repeat the measurements with the two sources of ultrasound vibrating out of-phase.

What you can learn about

  • Huygens principle
  • Longitudinal waves
  • Interference

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