Quick Answer: The Sound Pipes Model STEM Lab is a graduated set of sound pipes from 10 cm up to 30 cm long, hung on a base frame and struck with a mallet to show how pitch falls as pipe length increases.
Last updated: October 2026
Key Features
Graduated set of pipes from 10 cm up to 30 cm
Pipes suspended on nylon strings so they ring freely
Anti-topple base frame
Felt-tipped mallet included
End caps for converting an open pipe into a closed pipe
Technical Specifications
Specification
Value
Pipe lengths
Graduated set, 10 cm up to 30 cm
Mounting
Base frame with nylon string suspension
Included
Mallet, end caps
About This Product
Striking the pipes in turn from shortest to longest lets students hear the pitch drop as the length grows. Measuring each pipe and recording its frequency with a microphone sensor leads into wavelength, open and closed pipe boundary conditions and an estimate of the speed of sound in air.
Frequently Asked Questions
Why are the pipes of the Sound Pipes Model STEM Lab hung on strings?
A rigid fixing would absorb the vibration and muffle the sound; the nylon string suspension lets each pipe ring longer.
Can it show open and closed pipes?
Yes. End caps are included to turn an open pipe into a closed one so the two can be compared.
