▎ 摘　　要

NOVELTY - Producing porous composite material involves preparing a mixture of mechano-electrical conversion elements and electro thermal conversion elements in an organic solvent, mixing the mixture of the mechano-electrical conversion elements and the electro-thermal conversion elements in the organic solvent with an aqueous solvent to precipitate a piezoelectric hybrid filler material, mixing the piezoelectric hybrid filler material with a precursor and performing a foaming operation with the precursor to produce the porous composite material. USE - Method for producing porous composite material used for sound absorption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a porous composite material for sound absorption, which comprise porous polymer matrix and a piezoelectric hybrid filler dispersed in the porous polymer matrix, where the piezoelectric hybrid filler comprises mechano-electrical conversion elements and electro-thermal conversion elements.