Singing Wineglass

DCS Code: 3D40.50 Last Updated: March 27, 2026
Log in to reserve this demo

Purpose

Demonstrates friction-driven resonance in a wine glass. Running a wet finger around the rim excites the glass at its natural frequency, producing a sustained tone whose pitch depends on the water level.

Clear wine glass approximately half-filled with water on a gray surface against a dark background
Figure 1: A wine glass partially filled with water. The water level determines the resonant frequency — more water lowers the pitch.