Figure 1.a: Acoustic wave from a point source and scattered by an object.

 

Figure 1.b: Incident acoustic wave from a point source.

Figure 1.c: Scattered acoustic wave by an object.

 

Example 2:

Figure 2.a: Incident acoustic wave from a point source

Figure 2.b: Scattered acoustic wave by an object.

Figure 2.c: Total coustic wave from a point source and scattered by an object.