Experiment · Experimental skills

Resonance Tube Experiment

Measure the speed of sound in air with a virtual resonance tube: find the first two resonance lengths and use v = 2f(L₂ − L₁).

Last updated: 26 October 2026

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Measure the speed of sound in air with a virtual resonance tube: find the first two resonance lengths and use v = 2f(L₂ − L₁).

Lower the water slowly. The sound is loudest at the first resonance (about λ/4) and again about λ/2 further down. Use both to find the speed of sound.

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Resonance Tube Experiment

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What's happening? Lower the water slowly. The sound is loudest at the first resonance (about λ/4) and again about λ/2 further down. Use both to find the speed of sound.
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FAQs

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Why use the difference of two resonance lengths?

The end correction cancels, so v = 2f(L₂ − L₁) needs no end correction.

What is the end correction of a resonance tube?

About 0.3 times the tube diameter.

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