Sound Scattering and Its Reduction by a Janus Sphere Type
Figure 9
The directivity of the scattered far field pressure, which is plotted for when the sphere is in (a) free space, (b) its centre is 2.1 m away from a free surface, and (c) 2.1 m away from a hard ground. The wave frequency is 3000 Hz and the rest of the conditions are as in Figure 3.
