  Dynamic dielectric and mechanical responses of the microcomposites of the
ferroelastic-dielectric type were studied in this paper. The mechanical
inclusions-matrix interactions have influence on the mechanical moduli of the
composite. We have studied a mechanical response of the composite which
consists of the material M and of the other material I in which dispersion of
mechanic moduli of particles is present. The inclusions of the dielectric
material in the ferroelastic matrix has the effect on the dielectric response
of the microcomposite. We have found conditions for which the inclusions have
the effect of enhancement of the dielectric response. Results of low frequency
dielectric constant and dielectric loss in orthorhombic $ Al_{2}(WO_{4})_{3}$
show for polycrystalline material, where voids play the role of the dielectric
material, their linear increasing dependence on increasing hydrostatic pressure
p. These facts are qualitatively explained within our theory.
