Sound Intensity in relation to the distance

Description

Sound intensity or acoustic intensity is defined as the sound power per unit area. The usual context is the noise measurement of sound intensity in the air at a listener’s location as a sound energy quantity. For a spherical sound source, the intensity in the radial direction is a function of distance r from the centre of the source. The sound intensity decreases with 1/r^2 the distance from an acoustic point. source.