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From sound to an electrical signal

From sound to an electrical signal

Cross-section of a moving-coil microphone showing a sound wave pushing a diaphragm, the attached coil moving in a permanent magnet's field, and a varying potential difference supplied to a complete circuit

A moving-coil microphone converts the pressure variations in a sound wave into a varying electrical signal. It does this using the generator effect.

7.3.3 Microphones (HT only) Lesson

  1. GCSE
  2. /Physics
  3. /7.3.3 Microphones (HT only)

Step-by-step lessons covering AQA GCSE Physics 7.3.3 Microphones (HT only) for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build a strong grip on equations, units and Key Stage 3 fundamentals before tackling the more demanding topics like electromagnetism, the particle model of matter and space physics.

Lessons