A marine biologist is monitoring the low-frequency rumbles of blue whales and the high-frequency echolocation clicks of harbor porpoises. The whales communicate using infrasound, while the porpoises navigate using ultrasound.
Compare the frequency boundaries of infrasound and ultrasound, referencing the standard limits of human hearing.
35 exam-style questions 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 has a worked solution and a mark scheme showing where the marks go.