This presentation is a simplified explanation of a chapter of Class 9 NCERT science textbook followed by CBSE curriculum. We hear sounds everyday; some are pleasant like music while others might irritate like noise. Sounds are basically the disturbances or vibrations that are caused by the source in the medium and perceived by our ears. The properties of sounds are used in construction, healthcare, warfare, etc. Download this presentation to learn more about the characteristics of sound, applications of sound and the structure of human ear. Learn this PPT to score excellent marks on your exams.

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