"A sound wave with frequency higher than 20 kHz is not audible for human ear". Answer thefollozving in respect of this statement: (i) What is the term used for such a sound 1 (ii) Name two organisms producing sound in this range

CBSE Class 9 CBSE Class 9 Science
1

“A sound wave with frequency higher than 20 kHz is not audible for human ear”. Answer the following
in respect of this statement:
(i) What is the term used for such a sound ?
(ii) Name two organisms producing sound in this range.
(iii) Write an application of such a wave.

2

(i) Ultrasound.
(ii) Dolphins, bats.
(iii) Ultrasound scanning.