CBSE Class 9 Science Chapter 12 Sound Notes

Get access to Sound notes for class 9 here at BYJU’S. Notes are prepared by academic professionals having extensive knowledge. They are put across in a crisp and concise layout for the best of students’ comprehension. Continue reading to explore sound notes in detail.

CBSE Class 9 Science Chapter 12 Sound

Topics Covered In Chapter Sound

Production Of Sound

Propagation Of Sound

Sound Needs A Medium To Travel

Sound Waves Are Longitudinal Waves

Characteristics Of A Sound Wave

Speed Of Sound In Different Media

Reflection Of Sound



Uses Of Multiple Reflection Of Sound

Range Of Hearing

Applications Of Ultrasound


Structure Of Human Ear

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Frequently asked Questions on CBSE Class 9 Science Notes Chapter 12: Sound


What is ‘Sound’?

The sensation perceived by the sense of hearing is known as Sound.


What is ‘Propagation of sound’?

Sound is a sequence of waves of pressure which propagates through compressible media such as air or water.


What is ‘Reverberation’?

Reverberation is the persistence of a sound after its source has stopped, caused by multiple reflection of the sound within a closed space.


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