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Acoustic foam decoupler

An acoustic and decoupling layer technology, applied in the direction of sound-producing equipment, chemical instruments and methods, instruments, etc., can solve problems such as the impact of vehicle fuel economy, and achieve the effects of light weight, easy demoulding, and weight saving

Active Publication Date: 2019-06-28
AUTONEUM MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] To improve the insertion loss of trim components, the weight of the mass layer can be increased, but this weight increase can negatively affect the fuel economy of the vehicle

Method used

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Examples

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Embodiment Construction

[0120] figure 1 A schematic view of the inner fascia (1) is shown showing the position of the notches and the rounded base area (2). These notches and base regions are of different sizes and are distributed across the surface.

[0121] figure 2 A schematic cross-section of a 3D decorative part (3) according to the invention is shown. A recess (8) with a rounded base area towards the vehicle body (9) also has a layer of decoupler foam (5) and a mass layer (4). The first surface (6) of the decoupling layer faces the mass layer, and the second surface (7) faces the vehicle body.

[0122] image 3 A shows a schematic example of a hemispherical recess (10) according to the invention with a radius (r) and a circular base area (13). Due to the hemispherical shape and the circular base region, the radius (r) and height (h) have the same length or at least approximately the same length. The hemispherical indentation creates a cavity with air, and the circular base area at the s...

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Abstract

A noise attenuating trim part for a vehicle, with acoustic mass-spring characteristics comprising a mass layer comprising at least an impervious barrier layer, and a decoupling layer consisting of open cell foam and wherein the decoupling layer has a first surface adjacent to the mass layer and a second surface facing away from the mass layer, and wherein the decoupling layer and mass layer are laminated together and wherein the decoupling layer has at least one region with a plurality of indentations wherein each indentation comprises a round base area wherein the round base areas are situated in plane with the second surface and wherein the total surface area of the round base areas is between 10 and 40% of the total surface area of the second surface of the decoupling layer.

Description

technical field [0001] The present invention relates to automotive interior trim components, such as inner dash insulators and floor carpets, for noise attenuation in vehicles, particularly cars. Background technique [0002] There are many sources of noise in a vehicle, such as noise originating from the power train, tire noise, brake noise and wind noise. The noise generated by these various sources enters the passenger compartment of the vehicle and may cover a rather wide frequency range, especially the range of 400 to 4000 Hz. [0003] For noise attenuation in vehicles, especially in cars and trucks, the use of trim components such as insulators and absorbers to reflect and dissipate noise and thus reduce overall interior noise levels is well known. [0004] Noise-attenuating trim components, also known as trim components, such as inner fascia insulators and floor carpet systems, are molded into three-dimensional shapes to follow the shape of the vehicle body when inst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/168
CPCG10K11/168B32B2605/003B32B2605/08B32B3/30B32B5/18B32B5/022B32B27/065B32B27/12B32B15/046B32B27/08B32B25/08B32B25/10B32B25/045B32B2266/06B32B2266/0278B32B27/306B32B27/36B32B27/32B32B27/304B32B2274/00B32B2307/718B32B2307/732B32B2307/102B32B5/245B32B7/12B32B27/40B32B2305/022B32B2307/54B32B2307/72B32B2307/7265B60R13/083
Inventor 迈克尔·施恩哈特马尔科·塞皮
Owner AUTONEUM MANAGEMENT AG
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