Sound waves in a tube: measuring sound pressure profiles using smartphones

We present an experiment designed to study standing waves in a tube with one closed end. Two smartphones are used, one to emit a sound signal with a chosen frequency and another equipped with a microphone to detect the sound pressure level inside the tube. Due to the finite diameter of the tube, the...

Full description

Saved in:
Bibliographic Details
Published in:Physics education 2022-09, Vol.57 (5), p.55023
Main Authors: Soares, A A, Cantão, R F, Pinheiro Jr, J B, Castro, F G
Format: Article
Language:English
Subjects:
Acoustics
Diameters
Educational Technology
Handheld Devices
logarithmic scale
Physics
resonant wave in a tube
Science Experiments
Science Instruction
Scientific Concepts
Secondary School Science
Sound pressure
sound pressure level
Sound waves
Standing waves
Telecommunications
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present an experiment designed to study standing waves in a tube with one closed end. Two smartphones are used, one to emit a sound signal with a chosen frequency and another equipped with a microphone to detect the sound pressure level inside the tube. Due to the finite diameter of the tube, the standing wave node (or antinode) appears slightly outside of its opened end so the end correction is applied. Results show a good agreement with the theory, making this proposal suitable to be applied to secondary school classes. It is a low cost experiment and has the potential to increase the understanding of this physical phenomenon by secondary students.
ISSN:0031-9120
1361-6552
DOI:10.1088/1361-6552/ac7cb4