Sound Intensity in relation to the distance


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.

Related formulas


I2The sound intensity at far distance r2. (W*m-2)
I1The sound intensity at close distance r1 (W*m-2)
r1The close distance from the centre of the source (m)
r2The far distance from the centre of the source (m)