Patent ID: 8827466

Claim:
An exterior rear view mirror assembly for a motor vehicle, said exterior rear view mirror assembly comprising: a first housing part having a first inner surface; a second housing part fixedly secured to said first housing part and having a second inner surface, whereby said first and second housing parts create a housing that defines an opening on a rear side for a mirror glass, said second housing part includes a wall surrounding said opening and includes said second inner surface, said first and second inner surfaces are opposing each other and forming a rim such that said inner surfaces face each other and the interior of the housing; and a plurality of ridges being arranged within the rim to reduce noise created by wind entering the housing, whereby each of said plurality of ridges extend from one of said inner surfaces toward the other of said opposing inner surfaces with said plurality of ridges extending from one of said inner surfaces to an end spaced from the other of said inner surfaces defining a clearance, wherein said clearance of at least one of said plurality of ridges decreases as a linear distance along said at least one of said plurality of ridges with respect to the motor vehicle decreases.