Article | REF: R3112 V1

A reminder of physical acoustics

Author: Gilles REIGNER

Publication date: December 10, 2003

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2. Levels and decibels

2.1 Power

A sound source radiates power, and a portion of this power propagates through the surrounding fluid. Sound power is the energy emitted per unit of time (figure 1 ).

Sound power W produced by an omnidirectional source placed at the center of a spherical surface of radius...
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Levels and decibels