Q1Written answer
What is the audible range of the average human ear?
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Worked solution
20 Hz to 20,000 Hz. Any sound less than 20 Hz or greater than 20,000 Hz frequency is not audible to human ears.
NCERT · Class 9 · Science
Chapter 11: Sound
Practice each question, then open the answer or worked solution.
Section 12.4
Textbook page 170 · 2 questionsQ2Written answer
What is the range of frequencies associated with (a) Infrasound? (b) Ultrasound?
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Worked solution
(a) 20 Hz
(b) 20,000 Hz