Tranducing composite of sintered piezoelectric ceramic granules in a polymer matrix

A transducer comprisisng

• a substantially two-dimensional polymer matrix made of a homogenous material, the matrix having top and bottom opposing sides,
• a monolayer of sintered piezoelectric ceramic granules dispersed the polymer matrix, each granule having an upper portion protruding out of the top side of the polymer matrix and a lower portion protruding out of the bottom side of the polymer matrix, wherein the upper portion of each ceramic granule of the monolayer has a flattened top surface and wherein the top surfaces of the granules are substantially coplanar with one another and parallel to the plane of the polymer matrix and wherein the lower portion of each ceramic granules of the monolayer has a flattened bottom surface and wherein the bottom surfaces of the granules are substantially coplanar with one another and parallel to the plane of the polymer matrix, and each top surface and bottom surface having a layer of electrically conductive material thereon, and wherein the middle portion of each granule is in contact with the matrix,
• a top cover plate contacting the layer of electrically conductive material on the top surfaces and a bottom cover plate contacting the layer of electrically conductive material on the bottom surfaces and
• a seal disposed between the edges of the top cover plate and the bottom cover plate.