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Sound vs Noise 

Soundnoise both mean a sensation or effect produced by the stimulation of the auditory receptors of the ear and the auditory centers of the brain.

Sound is the general term applicable to anything that is heard regardless of its loudness or softness, its pleasantness or unpleasantness, or its meaningfulness or meaninglessness.

Noise basically applies to confused sounds emanating from many persons and usually suggests a clamor made by mingled outcries or shouts; in more general use, it may apply to a disagreeably loud or harsh sound, whatever its source.

Although the connotations of unpleasantness and discordance typically distinguish noise from sound, noise may sometimes be applied to a sound that merely engages the attention.