  The dispersion relation is derived for the coherent waves in fluid or elastic
media supporting viscous and thermal effects and containing randomly
distributed spherical scatterers. The formula obtained is the generalization of
Lloyd and Berry's [Proc. Phys. Soc. Lond. 91, 678-688, 1067], the latter being
limited to fluid host media, and it is the three-dimensional counterpart of
that derived by Conoir and Norris [Wave Motion 47, 183-197, 2010] for
cylindrical scatterers in an elastic host medium.
