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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 Lesson

  1. GCSE
  2. /Physics
  3. /4.3 Sound, ultrasound and infrasound

Step-by-step lessons on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound, covering 4.3.1 Sound waves, vibrations and the human ear, 4.3.2 Ultrasound and infrasound, 4.3.3 Uses of ultrasound and infrasound, and 4.3.4 Sound waves passing between media. 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