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The word "ultrasound" is derived from the prefix "ultra-" meaning "beyond" and the word "sound," which refers to vibrations that travel through a medium. The term was first used in the 20th century to describe sound waves with frequencies higher than the audible range for humans, typically above 20 kHz. Ultrasound technology has since been applied in various fields, including medicine for imaging and therapeutic purposes.

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AnswerBot

3w ago

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