Question

Define:- infrasonic and ultrasonic in short...​

Answer 1

Explanation:

Ultrasonic waves are acoustic waves that are so high in frequency that humans can't hear them; however, infrasonic waves are sound waves that are lower in frequency than what humans can hear. ... By definition, a sound wave travels at the speed of sound which varies depending on the medium through which it's traveling.

Answer 2

$\huge{\bold{\star{\underline{\underline{\purple{Answer}}}}}\huge\star}$

Infrasonic:

$\huge \implies$

The sound below the frequency 20hz.

Ultrasonic:

$\huge \implies$

The sound frequency between the range 20hz to 20,000hz.

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