The normal range of human hearing is from 20 Hz to 20,000 Hz20,000\text{ Hz}20,000 Hz. Sound waves with frequencies below 20 Hz are classified as infrasound.
Suggest two physical or structural reasons why the human ear cannot detect infrasound waves.
Draft your response as two distinct points.
35 exam-style questions on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound (physics only). Each one has a worked solution and a mark scheme showing where the marks go.