Key term for Edexcel GCSE Physics, used in Sound and Ultrasound.
Longitudinal sound waves with a frequency below the lower limit of human hearing (less than 20 Hz).
Infrasound appears in Edexcel GCSE Physics revision content for Waves, especially Sound and Ultrasound and Uses of Ultrasound/Infrasound.
Waves
Sound and Ultrasound • Uses of Ultrasound/Infrasound
Waves
Sound and Ultrasound • Infrasound Definition
Waves
Sound and Ultrasound • Ultrasound Definition
Waves
Sound and Ultrasound • Sound Conversion and Hearing
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