*Full Lesson* Physics: Sound, Loudness and Pitch

This is the third lesson in a unit of work on sound. The lesson is aimed towards KS3 but could be adapted to other levels. The main focus of the lesson is to get pupils to interpret oscilloscope traces and identify the difference between high pitch and low pitch, loud and soft sounds.

For a bundle of all five lessons in this unit, click here.

During this lesson pupils will:

• Recap general knowledge about waves from prior lessons.
• Recap the features of transverse waves: Wavelength, amplitude and frequency.
• Identify high and low frequency sounds from a trace.
• Use a virtual (or real) oscilloscope to see how a trace changes with different types of sounds.
• Identify the difference between loud and soft sounds.
• Identify the difference between high pitch and low pitch sounds.
• Complete consolidation activities including drawing traces of different sounds.
• Investigate the audible frequency range of different animals and graph them.
• Suggest why different animals have different ranges based on activity and environment.
• Identify animals that can hear infrasound and ultrasound.

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