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Automotive trim part for sound insulation and absorption

A sound isolation and sound absorption technology, which is applied to vehicle parts, transportation and packaging, and sound-emitting devices, can solve the problems of difficult recycling of discarded materials for parts

Active Publication Date: 2013-01-23
AUTONEUM MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the use of different types of materials makes recycling of components and discarded materials more difficult

Method used

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  • Automotive trim part for sound insulation and absorption
  • Automotive trim part for sound insulation and absorption
  • Automotive trim part for sound insulation and absorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0093] figure 1 Insertion loss curves for Comparative Samples A-B and Sample C are shown. The shown simulated insertion loss is the transmission loss of the system consisting of multiple layers and the steel plate to which the multiple layers are applied minus the transmission loss of the steel plate.

[0094] The sound absorption and insertion loss of different prior art noise attenuating multilayers were simulated using measured material parameters and compared with the insertion loss and sound absorption of the noise attenuating multilayer according to the present invention. All samples had the same overall thickness of 25 mm.

[0095] Comparative sample A is a typical mass-spring system, which has an area mass of 1(kg / m 2 ) mass layer made of EPDM thick layer material and injection molded foam as decoupling layer. The total area mass of A is 2370(g / m 2 ).

[0096] Comparative sample B was made according to the principles of patent EP1428656, which discloses a multila...

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Abstract

A sound insulating trim part with at least one area with predominantly sound absorbing characteristics (absorbing area), at least one other area with acoustic mass-spring characteristics (insulating area), characterised in that the mass layer of the insulating area consists of the same porous fibrous layer as the absorbing area, in the insulating area adjusted to a dynamic Young's modulus (Pa) of at least (96-AW-t) with AW area weight (g / m2), and t thickness (mm) of the porous fibrous layer, and at least an impervious thin barrier layer between the porous fibrous layer and the decoupling layer.

Description

technical field [0001] The present invention relates to automotive trim for attenuating noise in a vehicle. Background technique [0002] There are many sources of noise in a vehicle including the driveline, drivetrain, tire footprint (caused by the road surface), brakes, and wind, among others. The noise generated by all these sources in the vehicle cabin covers a considerable frequency range, which may be as high as 6.3 kHz for normal diesel and gasoline vehicles (the noise emitted by these sources in the vehicle is here The sound power above the frequency is usually negligible). Vehicle noise is generally classified into low frequency, medium frequency and high frequency noise. Generally, low-frequency noise can be considered to cover the frequency range between 50Hz and 500Hz, and is dominated by "structure-borne": vibrations are transmitted through various structural paths to the panels surrounding the passenger cabin, which in turn transmit the noise Dissipate into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/08B32B5/02B32B7/00G10K11/168
CPCB32B7/02B32B27/12B60R13/0838B60R13/0815B32B2307/718B32B5/18B32B2307/54B32B7/00B32B2307/102B32B5/02G10K11/168B32B5/022B32B2262/0253B32B2262/0261B32B2262/0276B32B2262/14B32B2307/732B32B2605/08B60R13/00B60R13/08
Inventor 克劳迪奥·贝托里尼克劳迪奥·卡斯塔格内蒂
Owner AUTONEUM MANAGEMENT AG
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