Quick Answer: The Sonometer Apparatus is a hollow wooden resonance box with a stretched wire, two movable wooden bridges and a metric scale. Tension is applied through a pulley and weight hanger that takes slotted weights.
Last updated: October 2026
Key Features
Hollow wooden resonance box that amplifies the vibrating wire
Two movable wooden bridges to set the vibrating length
Metric scale along the box for placing the bridges
Pulley and weight hanger for loading slotted weights
Technical Specifications
Specification
Value
Resonance box
Hollow, wooden
Bridges
Two, movable, wooden
Scale
Metric, for bridge positioning
Tensioning
Pulley with weight hanger (slotted weights)
About This Product
The sonometer is used to verify the laws of transverse vibration of a stretched string: how frequency depends on vibrating length, tension and mass per unit length. With a tuning fork placed on the box, students find the resonant length and from it the frequency of the fork, and the same set-up can be used to find the frequency of AC mains.
Frequently Asked Questions
How is tension applied to the sonometer wire?
The wire passes over a pulley to a weight hanger, and slotted weights are added to the hanger to change the tension.
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