Relating to sound waves with frequencies above the range of human hearing, typically above 20,000 Hz. Used in medical imaging, cleaning, and various industrial applications.
From Latin 'ultra' meaning 'beyond' and 'sonic' from Latin 'sonus' meaning 'sound'. The term was coined in the early 20th century as scientists developed technology to generate and detect high-frequency sound waves.
Ultrasonic technology reveals a hidden world of sound all around us - from bat echolocation to dolphin communication to the cleaning bubbles in jewelry cleaners. What's remarkable is that this 'silent' sound can see inside human bodies, clean delicate instruments, and even levitate small objects.
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