Economy Resonance Tube

SKU: WA-9495 Category: Tag:



Economy Resonance Tube

Students will have no difficulty hearing resonant frequencies from this tube. Two nested cardboard tubes with a removable inner stopper allow students to perform resonance experiments on both open and closed tubes.

Using the inner plunger tube to vary the length of the column of air within allows students to investigate the effects of length on the resonant frequencies. A measuring tape is mounted to the plunger tube to indicate the effective length.

Remove the plunger tube and an open tube of constant length remains for further investigations. Students can vary sound source frequency to investigate an open-tube resonant frequency pattern.

Suggested Activities

  • Determine lengths of the tube at which resonance occurs when the frequency is constant.
  • Determine the frequencies at which resonance occurs when the length of the tube is held constant.
  • Determine the speed of sound in air.
  • Find the relationship between closed-tube and open-tube resonant lengths.


  • Outer Tube (length 1.3m; diameter 0.15m)
  • Inner Tube (Includes measuring tape and cap on one end)
  • Tube Stands (2)



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