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TP – 1161 An Introduction to the Fundamentals of Acoustics and Vibrations for Professional Engineers

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This technical paper presents the basic quantities used to describe acoustical properties. For the purposes of the material contained in this document perceptible acoustical sensations can be generally classified into two broad categories, these are:

Sound. A disturbance in an elastic medium resulting in an audible sensation. Noise is by definition “unwanted sound”.

Vibration. A disturbance in a solid elastic medium which may produce a detectable motion.

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