Question

what are ultrasonic vibrations how it is important​

Answer 1

$\huge\mathfrak{Answer}$

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 sound is traveling. Frequency Range 20 kHz to 60 kHz. That would be above 20 kHz, or 20,000 cycles per second.

Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws. Industrially, ultrasound is used for cleaning, mixing, and accelerating chemical processes. Animals such as bats and porpoises use ultrasound for locating prey and obstacles.[1] Scientists are also studying ultrasound using graphene diaphragms as a method of communication.[2]

Answer 2

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 sound is traveling. Frequency Range 20 kHz to 60 kHz. That would be above 20 kHz, or 20,000 cycles per second.