Abstract
Electrokinetics in highly concentrated colloid systems were reviewed and introduction of the background of historical and theoretical aspects on electroacoustics was emphasized, because electroacoustics has attracted much interests from academic and industrial fields recently. The theoretical aspects on CVI and ESA, being developed based upon the concept of sedimentation potential in terms of EDL deformation, were explained. In the highly concentrated systems, since particle - particle interactions play an important role for describing the relationship between zeta potential and dynamic electrophoretic mobility, two typical cases with/without interactions were shown.
