Economy Resonance Tube

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.