Measuring the Speed of Sound in Air Using a Smartphone and a Cardboard Tube

2018/12/31 by Simen Hellesund · 2 citations
Physics and Astronomy · #physics.ed-ph

paper · pdf · doi:10.1088/1361-6552/ab0e21

arxiv created 2019/02/05 · arxiv updated 2019/05/22

Abstract

This paper demonstrates a variation on the classic Kundt's tube experiment for measuring the speed of sound. The speed of sound in air is measured using a smartphone and a cardboard tube, making the experiment very economical in terms of equipment. The speed of sound in air is measured to within 3% of the theoretical prediction.

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• Demonstration of magnetic dipole-dipole interaction by using smartphone pressure sensor
• Determination of the magnetic moment of a magnet by letting it fall through a conducting pipe

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