Question

What is the range of frequencies associated with
(a) Infrasound?
(b) Ultrasound?

Answer 1

$\red {HELLO\:DEAR}$

(a) Infrasound has frequencies less than 20 Hz.

(b) Ultrasound has frequencies more than 20,000 Hz.

$\green {VISHU\:PANDAT}$

$\blue {FOLLOW\:ME}$

Answer 2

$\huge{ \boxed{ \underline{ \bf \red{ANSWER}}}}$

$<marquee>Infrasound : Less than 20Hz$

Ultrasound : More than 20000 Hz