21Hz Tuning Fork with Plotter Pen

The 21Hz Tuning Fork with Plotter Pen allows for plotting oscillations on a sheet of paper. Oscillation is easily triggered by pushing the prongs of the fork together, the resulting oscillation is highly visible both with the naked eye or with the aid of a stroboscope. A plotter pen with holder are securely placed on one leg of the tuning fork, while a counterweight gives correct balance to the other. A simple yet effective way of leading a physical demonstration of sound waves.

Specifications

• Natural frequency: 21Hz
• Length: 245mm
• Total weight: approx. 170g