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Class 9 Science: Sound Concepts by Ravi Ranjan Singh is a document available to read on EtoBox.

What is Class 9 Science: Sound Concepts about?

1. Sound is produced by vibration which creates compressions and rarefactions that propagate in a medium like air. An experiment shows that sound needs a material medium to travel by demonstrating that sound from a bell cannot be heard in a vacuum. 2. Sound waves are longitudinal waves because the vibration of particles in the medium is parallel to the direction of the wave propagation. 3. Reverberation is the repeated reflection of sound in an enclosed space. It can be reduced by covering hard surfaces

Author

Ravi Ranjan Singh

Language

EN