Powerpoint lecture covering the following in a modern, concise format:
Specification Point 3.24P - Know that the frequency range for human hearing is 20–20,000 Hz.
Specification Point 3.25P - Practical: investigate the speed of sound in air.
Specification Point 3.26P - Understand how an oscilloscope and microphone can be used to display a sound wave.
Specification Point 3.27P - Practical: investigate the frequency of a sound wave using an oscilloscope.
Specification Point 3.28P - Understand how the pitch of a sound relates to the frequency of vibration of the source.
Specification Point 3.29P - Understand how the loudness of a sound relates to the amplitude of vibration of the source.
Complete set of Chapter 3 Lectures are available.
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