Abstract: A sound-damping mat or drape comprises a flexible layer (5) having distributed therein particles (5) of a higher specific gravity than the material of the flexible layer. The flexible layer comprises a material having open pores and the pores are filled over at least a part of the thickness of the layer with said particles. The particles are bound to each other and to the defining walls of the pores. The mat or drape is preferably manufactured by vibrating the heavy particles down into the pores of the porous flexible layer, whereafter a binder is sprayed over the surface of the layer.