Ultrasonic Levitator
Ultrasonic Levitator
Set up for Ultrasonic Levitator demo
Ultrasonic Levitator
Circuit Board

 

Code Number: 3B30.01

Demo Title: Ultrasonic Levitator

Condition: Excellent

Principle: Acoustic Levitation

Area of Study: Oscillations & Acoustics

Equipment: 

Ultrasonic Transducer with Power Supply Circuit Board, Styrofoam Pellets, Screen "Spoon", Syringe and Water, and Height Gauge with Flat Plexiglas Reflector.

Procedure:

The kit unit is the easiest to use for class as it can run all period without overheating.  Plug in the power and turn on the switch that is on the ciruit board.  Use the metal screen spoon to position the small styrofoam balls in the desired locations.  Note that drops of water, or small insects can also be levitiated with this unit.

Run the following demonstration for only 5 minutes at a time as the transducer gets very hot when operating.

Power up the ultrasonic transducer and the fan that cools the circuit board.  Place the reflecting plate over the transducer and then place a single Styrofoam pellet in the center of the transducer.  Adjust the height of the reflecting plate until this pellet lifts off the transducer.  You should then be able to place a string of Styrofoam pellets or water drops into the ultrasonic standing wave that is produced.

References:

  • R. Scott Schappe, Cinthya Barbosa, "A Simple, Inexpensive Acoustic Levitation Apparatus", TPT, Vol. 55, #1, Jan. 2017, p. 6.
  • David P. Jackson, Ming-Hua Chang, "Acoustic Levitation and the Acoustic Radiation Force", AJP, Vol. 89, #4, April 2021, p. 383.
  • D. P. Jackson, M. -H. Chang, "Back Scatter - Visualizing Acoustic Levitation", Physics Today, Vol. 74, #7, July 2021, p. 64.
  • Steven K. Blau, "Sound Strategy for Levitating and Moving Particles", Physics Today, Vol. 68, #3, Mar. 2015, p. 17.
  • Jason Bardi, "Acoustic Levitation Made Simple", Applied Physics Letters, Jan. 2015.
  • Marco A. B. Andrade, Nicolás Pérez, and Julio C. Adamowski, "Particle Manipulation by a Non-Resonant Acoustic Levitator", Applied Physics Letters, Vol. 106, Jan. 2015, p. 014101.
  • Paul Noel, "Basic Acoustic Levitator Instruction Manual", AAPT Summer Meeting 2018.
  • Paul Noel, "Sonic Levitator, Apparatus Competition Booklet, AAPT Summer Meeting 2016, p. 34.
3B30.01 - Ultrasonic Levitator

AIP Publishing Acoustic Levitation Made Simple

Acoustic Levitation in ULTRA SLOW MOTION - Smarter Every Day 134
Shape oscillation of a levitated drop in an acoustic field