Resonance in Plates, Bars, Solids – 3D40.00

Singing Rod – 3D40.20

Singing Rod Real 3D40_20

  • A long aluminum rod will sing when it is stroked along its length with rosin and supported at its center.
  • Find the center by balancing the rod on your finger.
  • Rub some rosin on your free hand and vigorously stroke the rod.
  • You will need to squeeze hard. Also try holding the rod at a point 1/3 or ¼ of its length to excite higher harmonics.

Location: Jacobs B122 – Shelf 286

Chladni Plate – 3D40.30

Chladni Sine 3D40.30 Chladni Square 3D40.30

  • A square plate is clamped at its center.
  • Sand is sprinkled on it and place is excited with a mechanical vibrator and a frequency generator.
  • The sand will show the nodal lines of the excited pattern.
  • The pattern will change depending on the frequency applied to the mechanical vibrator.

Location: Jacobs B122 – Shelf 263

Shattering the Beaker/ Wine Glass – 3D40.55

  • Laboratory beakers or wine glasses are shattered in a chamber when large amplitude sound at the resonant frequency is directed at a beaker or a wine glass.

Location: Jacobs B122 – Shelf 283