3D40.20 • Resonance in Plates, Bars, and Solid: Singing Rod

Location: Cabinet 5

Instructions / Notes:

• A long aluminum rod will sing when it is stroked along its length with rosin and supported at its center.
• A 6-foot , 1/4" diameter rod can be held in the hand between the thumb and forefinger. Find the center by balancing the rod on your finger.
• Rub some rosin on your free hand and vigorously stroke the rod. YOU NEED TO SQUEEZE HARD.
• Also try holding the rod at a point 1/3 or 1/4 of its length to excite higher harmonics.
• The 12-foot, 3/4" diameter rod is clamped to the lecture bench and has a louder tone.

Last updated on April 27, 2026