Question

The ratio of speed of ultrasonic wave and sound wave is:

• A. $=1$
• B. $>1$
• C. $<1$
• D. $>1$

Answer 1

The correct option is A $=1$

Ultrasonic wave is defined as “inaudible sound with high frequency for human” the frequency of which generally exceeds 20 kHz. These days, sound wave which is not intended to be heard is also called Ultrasonic wave .

Ultrasonic wave is also a type of sound wave so ratio of velocity is $=1$