Whirling Sound Pipe – 73 cm, 5 Frequencies

The Whirling Sound Pipe is a 73 cm corrugated plastic tube designed to demonstrate sound waves, resonance and harmonics in school physics lessons. When swung in a circular motion, air moving through the tube produces an audible tone.

As the pipe is whirled faster, the pitch increases in distinct steps rather than continuously. This occurs because of the resonant frequencies and harmonics of the tube. Up to five different tones can be produced.

Key Features

• Produces up to five distinct tones when whirled
• Demonstrates sound frequency, resonance and harmonics
• Pitch changes in steps as the rotation speed increases
• Corrugated plastic construction
• Suitable for classroom sound and waves demonstrations

Specifications

• Length: 73 cm
• Material: Plastic
• Colour: Assorted – colours may vary
• Quantity: 1 sound pipe

Suggested Classroom Activity

Use alongside a wave modelling spring to explore standing waves, frequency and resonance through complementary demonstrations.

Safety: Use in a clear area with sufficient space to swing the pipe safely.

Downloadable Instruction Guide & Classroom Activities

Learn how to use the sound pipe, explore harmonics and resonance, and try practical classroom investigations with our free Delta Whirling Sound Pipe Instruction Guide (PDF).