Acoustically effective wheel house covering for vehicles

Details Acoustically effective wheel house covering for vehicles Acoustically effective wheel house covering for vehicles

2004-04-13

2008-11-11

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing fence or screen

Reexamination Certificate

active

07448468

ABSTRACT:
The invention relates to an acoustically effective wheel house covering for vehicles, i.e. a wheel house covering which can reduce transmission of splash water noises in the passenger compartment of the vehicle and which can absorb the sound of rolling tires on a roadway, which wheel house covering comprises several layers of material. In order to improve the sound-absorbing effect of such wheel house coverings, it is proposed that the wheel house covering is formed of at least three air-permeable sandwiched layers of material (6, 9, 10) comprising a first textile material layer (6) facing the wheel housing, with the air permeability of said first textile material layer at a test pressure of 1 mbar ranging from 15 to 60 l/m2s, and with the air permeability of a second textile material layer (10) arranged between the first (6) and third (9) material layers at a test pressure of 1 mbar ranging from 100 to 1500 l/m2s, wherein the third material layer (9) is a textile material layer facing the tire, with the air permeability of said third material layer at a test pressure of 1 mbar ranging from 20 to 200 l/m2s.

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