  Practical application of Gauss' law in acoustics is not a very well known
method. However, any inverse square law behavior can be formulated in the way
similar to Gauss' law, which allows us to extend the same principle to sound
waves propagation. We show in this paper how the acoustic power of sound source
can be related to the sound intensity flow through a given surface by means of
the Gauss' law. Several different sound-source shapes, important in practical
applications, are analyzed by means of the Gauss' law. A suitable choice of the
Gaussian surface allows us to obtain the simple and straightforward method for
calculating the sound intensity distribution in space.
