Sound insulation with multilayer fibre insulation; and method of manufacturing the same

A sound-insulating floor covering for a motor vehicle, which has an insulating device comprising fibres, wherein this insulating device extends along a longitudinal direction, a width direction and a thickness direction and wherein this insulation device preferably has different acoustic and/or mechanical-physical properties in at least one of these directions, wherein this floor covering has a material structure which preferably has at least one nonwoven element and at least one film element

• wherein
• the insulating device has a multilayer structure and at least one layer of this insulating device is a—preferably flocked—layer with fibres, or a layer containing fibres, or a foam layer, and this insulating device is connected to a wear surface of the insulating device and/or arranged thereon by a coupling layer, wherein this coupling layer having a compression hardness which is in a range between 0.2 kPa and 5 kPa, preferably 0.5 kPa to 2 kPa.

A method for producing a sound-insulating floor covering with a multilayer flocked insulation device,

• wherein
• first a first and then a second layer is flocked in a flocking device, wherein the sequence of the material quality being selected in such a way that the layer which later faces the wear surface has a predetermined compression hardness and in particular a compression hardness in the range from 0.2 kPa to 5 kPa, preferably 0.5 kPa to 2 kPa, and the other layer has a predetermined compression hardness and in particular a compression hardness in the range from 5 kPa to 30 kPa, preferably 10 kPa to 20 kPa.