This video covers:
How sound waves travel through materials
The idea that sound waves are longitudinal
How wavelength changes with speed
The structure of the human ear and how it works
How the range of human hearing changes with age

Exam board specific info:
AQA Separate/triple science and higher tier only
IGCSE Edexcel Not really in your course (apart from the fact that human hearing is 2020,000 Hz)
Edexcel Separate/triple science and higher tier only
OCR 21st Century Separate/triple science and higher tier only
OCR Gateway Separate/triple science and higher tier only

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