Question

व्हाट आर अल्ट्रासोनिक वेव्स हाउ आर डे प्रोड्यूस​

Answer 1

Answer:

Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz. The term sonic is applied to ultrasound waves of very high amplitudes.

In most applications, ultrasonic waves are generated by a transducer that includes a piezoelectric crystal that converts electrical energy (electric current) to mechanical energy (sound waves).