Transmission loss of a plane longitudinal wave traveling through a -thick slab submerged in water. The slab is homogeneous stiff polymer (dashed dotted line) or composite polymer containing hollow glass microspheres with (solid line). The cross points denote the experimental data from Baird et al.
The absolute value of in for a hollow glass microsphere in unbounded polymer under longitudinal incidence. The hatched region denotes the analyzing frequency range investigated in this paper.
Transmission losses of a plane longitudinal wave traveling through -thick slabs of stiff polymer containing various microspheres. In all computation, . Three kinds of hollow glass microspheres with different inner radii: (dashed line), (long dashed dotted line), and (solid line). The dashed dotted and dotted lines denote the air and the filled glass inclusions, respectively.
The absolute amplitudes of in for various isolated microspheres in unbounded polymer under longitudinal incidence. The microspheres are the same as those in Fig. 3 and indicted by the same line types correspondingly.
Transmission loss of the slab in Fig. 1 including only the monopole partial wave. The results are plotted by dashed dotted line. For comparison, the original plot in Fig. 1 is given again by solid line.
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