Activity

Measuring the speed of sound

In this investigation, students measure distance and time in order to calculate the speed of a sound wave.

The investigation supports the science capability ‘Gather and interpret data’. It also provides a real-world context in which to practise mathematical skills.

Set-up for measuring the speed of sound using an echo diagram.

Set-up for measuring the speed of sound using an echo

Sound travels to a distant building and returns as an echo. Students use a timing app and distance to calculate the speed of sound.

Rights: The University of Waikato Te Whare Wānanga o Waikato

By the end of this investigation, students should be able to:

  • calculate the speed of sound

  • explain why we see a lightning bolt before we hear the thunder.

Equipment required includes:

  • sound-making device (wooden clapper)

  • device with timing software app

  • tape measure

  • an outdoor space of at least 150 metres with a building at one end.

Download the Word file (see link below).

Related content

This article is part of an article series :

with the accompanying investigation:

Learn more about sound with these articles:

Useful links

Download the app software from https://phyphox.org/:

Published:13 September 2019