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4.3 Sound, ultrasound and infrasound (physics only)
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How sound travels

How sound travels

Cross-sectional diagram of the human ear showing the pathway from pinna and eardrum through the ossicles and cochlea to the auditory nerve

Sound is a longitudinal mechanical wave produced by a vibrating source. The source pushes and pulls nearby particles, creating alternating compressions and rarefactions that transfer energy through a medium.

4.3 Sound, ultrasound and infrasound (physics only) Lesson

  1. GCSE
  2. /Physics
  3. /4.3 Sound, ultrasound and infrasound (physics only)

Step-by-step lessons on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound (physics only). Each one builds up to exam-style questions. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons