What Is Ultrasonic Sound ?

1.	What Is Ultrasonic Sound ?
Answer» It is SOUND of FREQUENY more than 20 KHZ ( 20,000 cycles / sec ) . It is sound of frequeny more than 20 KHz ( 20,000 cycles / sec ) .

Answer»

It is SOUND of FREQUENY more than 20 KHZ ( 20,000 cycles / sec ) .

It is sound of frequeny more than 20 KHz ( 20,000 cycles / sec ) .

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