초록 ▼

A sound insulation part for surfaces with known source-sink distribution, in particular in passenger spaces of motor vehicles, is provided, which is designed as a mass-spring system with discontinuities incorporated therein for the purpose of converting sources into sinks. In order to achieve a part

A sound insulation part for surfaces with known source-sink distribution, in particular in passenger spaces of motor vehicles, is provided, which is designed as a mass-spring system with discontinuities incorporated therein for the purpose of converting sources into sinks. In order to achieve a particularly effective sound insulation with low mass or light weight, the sound insulation part contains, over limited parts of its surface, closed cells (1) embedded in the spring (foam 3) and encased in coils (2). These cells (1) can be directed towards the heavy layer (4) or the panel (8) which the part adjoins, or can be wholly or partly in the intermediate region. The cells (1) can be gas- or air-filled. The foils (2) advantageously have masses of about 25 to 150 g/m2 of surface.

대표청구항 ▼

A sound insulation part, comprising: a body made of a resilient foam material, substantially defining the size and shape of the souond insulation part, and including an outward surface; and a cover layer secured on and covering the outward surface of the body; the body forming a multitude of spaced

A sound insulation part, comprising: a body made of a resilient foam material, substantially defining the size and shape of the souond insulation part, and including an outward surface; and a cover layer secured on and covering the outward surface of the body; the body forming a multitude of spaced cells inside the body, each cell including (i) an interior and an outside surface extending completely around said interior, (ii) flexible, gas impermeable foil held against the outside surface of the cell, and extending completely around and completely enclosing the interior of the cell, and (iii) a supply of gas captured by the foil in the interior of the cell; the cells conducting sound at a rate faster than the rate at which the body conducts sound, wherein the cells convert sound sources into sound sinks.