What are Ultrasonics?

'ULTRA'-sonic is a sound wave with a frequency above the normal range of human hearing. Most humans can hear up to 16,000 Hertz. Young people can hear almost to 20,000 Hertz. Bats and mice and other...

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Sounds which have frequency greater than 20,000Hz are inaudible to human ears are called ultrasonics.

Ultrasonic cleaning is cleaning through ultrasonic waves (http://en.wikipedia.org/wiki/Ultrasonic_wave#Ultrasonic_cleaning) with chemicals. See more on ultrasonic cleaning...

Ultrasonic vibrations would refer to sound waves that have a frequency higher then human hearing. The vibration themselves would be the physical vibration of the molecules in the medium in which the...