Question 2 Page 170 - Chapter 12 Class 9 - Sound

Last updated at April 16, 2024 by

What is the range of frequencies associated with

(a) Infra-sound?

(b) Ultrasound?

 

Answer 

(a) Infra-sounds have frequencies less than 20 Hz.

(b) Ultrasounds have frequencies more than 20,000 Hz.

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