Physics for IGCSE & O level - Waves And Sounds (Section 2 - No. 20)
What is ultrasound?
Sound waves with a frequency below the human hearing range.
Sound waves with a frequency within the human hearing range.
Sound waves with a frequency above the human hearing range.
Light waves with a specific wavelength
Explanation
Ultrasound refers to sound waves with frequencies higher than the upper limit of human hearing.
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