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Sound Propagation

For sound propagation, it needs a medium. The medium needed by sound to propagate must be a material medium, elastic and continuous. Sound waves in air consist of compression and refractions of air. When a person speaks, the air closer to his mouth is pushed in the direction of sound. The air molecules get distributed and start vibrating about their mean position. Such molecules which vibrate will disturb the nearest molecules for vibrating them. Continue this method until the molecules starts vibration which is nearer to listener. This causes the vibrations in the diaphragm of the ear.

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