Abstract: A motor vehicle door having a basic body (2; 22) and respectively an inside and an outside panel (4, 3; 23, 21; 27, 26), wherein the window-side circumferential edge (9) of the outside panel (3; 21; 26) is provided at least partially with an undercut (10) engaged by the corresponding regions of the circumferential edge of the basic body (2) or the inside panel (4), and wherein the outside panel (3) is provided with a folded section (16) at least at the end (15) of the circumferential edge (8) disposed opposite the window-side circumferential edge. To accomplish easy, quick and cost-advantageous mounting or replacement of the outside panel, the basic body (2; 22) or the inside panel (4; 23; 27) is connected by way of fastening means (18; 24; 28) to the wall region (20) of the folded section (14) of the outside panel (3; 21; 26), which wall region faces the door sill (14) of the corresponding motor vehicle.

Abstract: A housing lining for a piston engine, drive motor, or machine composed of a sound-absorbent layer of fibers. The fibers are compressed and glued to form an essentially pore-free supporting frame at least in the vicinity of the edge of the layer.

Abstract: A housing lining for a piston engine, drive motor, or machine composed of a sound-absorbent layer of fibers. The fibers are compressed and glued to form an essentially pore-free supporting frame at least in the vicinity of the edge of the layer.

Abstract: An airborne-sound-absorbing shaped component is disclosed. The element comprises at least two chambers that are arranged adjacent to one another in the direction of the vibrations that are to be introduced into the system. These chambers help delimit a shared cavity that is hermetically sealed with respect to the environment which also operates as a pneumatic spring. Each of the chambers is delimited by a delimiting wall made of a polymer material, the delimiting walls being configured integrally and continuously with one another and joined to one another in a transition region, in a manner allowing relative movement by at least one spring element that is resilient in the direction of the introduced vibrations.

Abstract: A wheel lining with a structure made of a polymer, mounted at a distance from wheel, self-supporting, and impermeable to air. The lining is double-walled and incorporates at least two chambers. The walls of the chambers the facing the wheel are provided with at least one opening each to form Helmholtz resonators.

Abstract: A housing lining is disclosed with a self-supporting and airborne sound-absorbing layer of fibers. The fibers are compressed and glued together at least in the region of the edge surrounding the layer on the outside, to form an essentially pore-free supporting frame. The supporting frame may be provided with a cup-shaped bulge which comprises sound absorption surfaces which have a sound impedance of 20 to 200 Rayl.