Multi-layered sound-insulating panel for motor vehicles, or similar
First Claim
1. A multi-layered sound-insulating panel in combination with a sheet metal surface of a motor vehicle having an engine and drivetrain and passenger compartment for use in reducing sound from the engine and drivetrain from being transmitted to the passenger compartment, which sound has substantial components in the 100-150 Hz frequency range and being present at different levels at different location in the motor vehicle, said panel comprising:
- a homogeneous foamed elastic material having at least one dense layer and a resilient layer, said resilient layer being adapted to be in contact with a sheet metal surface of the motor vehicle between the passenger compartment and the engine and drivetrain and having a predetermined shape constituted by a plurality of noise-insulating depressions or protrusions arranged in a nonuniform, predetermined distribution on the surface thereof to insulate said different sound levels at said different locations in the motor vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-layered sound-insulating panel for motor vehicles, or similar, consisting of at least one dense layer and one resilient layer between the dense layer and the part of the motor vehicle, or similar, to which the panel is attached, makes it possible--while achieving the acoustic effect required--to realize a design weighing as little as possible, provided the resilient layer has a special shape on account of recesses and/or indentations, and/or knobs, fashioned on purpose.
25 Citations
16 Claims
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1. A multi-layered sound-insulating panel in combination with a sheet metal surface of a motor vehicle having an engine and drivetrain and passenger compartment for use in reducing sound from the engine and drivetrain from being transmitted to the passenger compartment, which sound has substantial components in the 100-150 Hz frequency range and being present at different levels at different location in the motor vehicle, said panel comprising:
- a homogeneous foamed elastic material having at least one dense layer and a resilient layer, said resilient layer being adapted to be in contact with a sheet metal surface of the motor vehicle between the passenger compartment and the engine and drivetrain and having a predetermined shape constituted by a plurality of noise-insulating depressions or protrusions arranged in a nonuniform, predetermined distribution on the surface thereof to insulate said different sound levels at said different locations in the motor vehicle.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of insulating noise in a motor vehicle wherein different levels of noise are produced at different locations on the sheet metal therein comprising the steps of:
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providing a sound-insulating panel comprising a homogeneous foamed elastic material having at least one dense layer and a resilient layer, providing said resilient layer with a plurality of noise-insulating depressions and protrusions arranged on the surface thereof, distributing said depressions and protrusions on said surface of said resilient layer in a nonuniform, predefined distribution according to said different levels of said noise, and disposing said panel in said motor vehicle to insulate said noise by arranging said surface of said resilient layer having said depressions and protrusions in contact with said sheet metal surface.
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Specification