초록 ▼

A plate-component (1) which can be used for airborne-sound insulation has chambers (5, 6) filled with a pulverulent or granular, e.g. metallic material, whose chamber walls (2, 3, 4) at least partly are formed by a flexible material. Chambers (5, 6) are small in the vertical direction, but in the ho

A plate-component (1) which can be used for airborne-sound insulation has chambers (5, 6) filled with a pulverulent or granular, e.g. metallic material, whose chamber walls (2, 3, 4) at least partly are formed by a flexible material. Chambers (5, 6) are small in the vertical direction, but in the horizontal direction can form long channels. This construction not only leads to an increase in the sound insulation of a board joined to component 1 corresponding to an increase in the weight per unit area, but it is also possible to prevent coincidence breakdowns in the range 100-3000 Hz.

대표청구항 ▼

An airborne sound attenuating construction for use in walls, doors, and the like, comprising: means elongated in a vertical and a horizontal dimension for providing flexible walls defining a plurality of chambers spaced apart in at least said vertical dimension; a spherical metallic granular materia

An airborne sound attenuating construction for use in walls, doors, and the like, comprising: means elongated in a vertical and a horizontal dimension for providing flexible walls defining a plurality of chambers spaced apart in at least said vertical dimension; a spherical metallic granular material consisting of a plurality of steel spheres; said spherical metallic granular material disposed in each of said chambers in close-packing relationship; and each of said chambers having a shape dimensiond to restrict settling movement of said spherical metallic granular material consisting of said plurality of steel spheres disposed therein in close-packing relationship, and wherein said walls defining said plurality of chambers are spaced apart approximately from 3 to 10 millimeters for forming said shape dimensioned to restrict settling movement of said spherical metallic granular material.