Question

Question 18: How is ultrasound used for cleaning?

Answer 1

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Objects to be cleansed are put in a cleaning solution and ultrasonic sound waves are passed through that solution.

The high frequency of these ultrasound waves detaches the dirt from the objects.

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Answer 2

hey dude here is the complet explaination

In an ultrasonic cleaner, the object to be cleaned is placed in a chamber containing a suitable solution (in an aqueous or organic solvent, depending on the application). In aqueous cleaners, surfactants (e.g., laundry detergent) are often added to permit dissolution of non-polar compounds such as oils and greases. An ultrasound generating transducer built into the chamber, or lowered into the fluid, produces ultrasonic waves in the fluid by changing size in concert with an electrical signal oscillating at ultrasonic frequency. This creates compression waves in the liquid of the tank which 'tear' the liquid apart, leaving behind many millions of microscopic 'voids'/'partial vacuum bubbles' (cavitation). These bubbles collapse with enormous energy; temperatures and pressures on the order of 5,000 K and 135 MPa are achieved;[6][7] however, they are so small that they do no more than clean and remove surface dirt and contaminants.

hope it helps you