How “Makerspace” acoustic levitation works

Members of “Makerspace” tried to make an experiment with standing sound waves, which theoretically could generate different layers of air pressure. In order to create the standing wave was used ultrasonic transducer, which is normally used for vibratory cleaning baths to make faster for plaque cleaning with solvents.


Experiment with standing sound waves is cool, because ultrasonic transducer with 40 kHz frequency sound waves and echo generate different layers of air pressure – each 8 mm (0.32 in). It’a like invisible shelves where every in between embedded object creates a lifting force or so called acoustic levitation. Look at this scheme:

Acoustic levitation gif

It’s great that plenty of these layers can be formed. In video below you can see sea foam bubbles placed one by one. Take a look, it seems like a magic trick!

At that time, our workshop record was 11 bubbles, but 12 bubbles is too much, they are falling down. This device was later adjusted, placed into a beautiful casing and demonstrated through scientific events, the University Open Days. Acoustic levitation machine is fun for both young and older audiences!


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s