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## Basics of Sound - What is Sound? - is a form of energy - is a pressure wave, created by a mechanical action, and is therefore called a mechanical wave. - is produced when a vibrating source causes the molecules of a medium to move back and forth. - requires a medium in which to propagate...

## Basics of Sound - What is Sound? - is a form of energy - is a pressure wave, created by a mechanical action, and is therefore called a mechanical wave. - is produced when a vibrating source causes the molecules of a medium to move back and forth. - requires a medium in which to propagate; therefore, it cannot travel in a vacuum. - is a mechanical, longitudinal wave.

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