Two sound waves are superimposed. The resulting pressure variation at a single point at a distance 'x' from the source is graphed below :
The beat frequency of the resulting sound wave is :

When two sound waves are superimposed, beats are produced when they have

When two sound waves are superimposed, beats are produced when they have

Phenomenon of beats is audible if the difference in the frequency of the sound waves is

Phenomenon of beats is audible if the difference in the frequency of the sound waves is

The pressure variations in the propagation of sound waves are:

The pressure variations in the propagation of sound waves in gaseous medium are

Spherical sound waves are emitted uniformly in all direction from a point source. The variation in sound level SL. As a function of distance r from the source can be written as where a and b are positive constants.

Spherical sound waves are emitted uniformly in all direction from a point source. The variation in sound level SL. As a function of distance r from the source can be written as where a and b are positive constants.