Demonstration: This compares the speed of sound at different pressures and in different gases.
Demonstration: An oscilloscope is used to time a pulse of sound travelling from a speaker to a microphone.
Demonstration: An oscilloscope is used to find the time of travel of a pulse of sound generated by its time-base.
Class practical: Echoes are used outdoors to estimate the speed of sound. Good weather has to be ordered at the same time as...
Demonstration: waste pipe is used to illustrate interference of sound waves coming from a single source by two different paths...
A widespread activity is to make a rough measurement of the speed of sound by timing the gap between making a sound and...
Clap your hands not too far from a big wall and you can hear both the original clap and, shortly afterwards, its echo. What is...
Sound can travel through any medium, so long as there are sufficient particles in each cubic metre to allow the to and fro...
Pupils need to differentiate between the speed of sound in air and the speed of light in air.
When we teach about sound, light and other radiations in school, it is well worth remembering that these are familiar things...
Based on everyday reasoning many students believe that sounds travel more slowly in solids than in gases.
This episode considers how these three quantities are linked by the wave equation v = f × λ , measuring f using an...
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