What is the range of frequencies associated with

Question.
What is the range of frequencies associated with

(a) Infrasound ?

(b) Ultrasound ?

Solution:

(a) Infrasound : Sound waves of frequencies between 1 to 20 Hz.

(b) Ultrasound : Sound waves of frequencies above 20,000 Hz.
NCERT Questions Class 9 Science chapter 12 Sound

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