3D30.35 Whirly Tube

Concepts

Resonance in a pipe, overtones.

Overview

A whirly tube (a tube of corrugated plastic) is whirled in circles at different speeds producing resonance at different pitches, along with overtones.

Details

Equipment

  • [1] Whirly tube 

Important Notes

  • Details of the whirly tube can't be seen in a large lecture hall, but the sound can be clearly heard.
  • The pitch emitted by the whirly tube depends on how quickly you whirl it. Pitch does not increase linearly, but jumps by discrete intervals.
  • If you practice in advance, you can play "Taps," a song played at military funerals.

Script

  1. Hold the whirly tube at one end and whirl it in a circle.
  2. Adjust your whirl speed to adjust the pitch emitted.

Additional Resources

References

  • PIRA 3D30.35

Last revised

  • 2018

Technicals

Related AV

Related demos

If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.