This apparatus is ideal for all resonance investigations in air columns particularly the Salters
MUS Activity 9. The main tube is 1 metre long and 50mm diameter which takes a high power sound
wave generator unit plugged in to one end. The generator is driven by a standard laboratory signal
generator and as the frequency is adjusted the various resonance modes are detected by increased
loudness of the note. The open pipe can be studied or a variable length closed pipe can be used by
inserting the piston assembly provided.