Sheet metal member conveying exhaust gas of a motor vehicle exhaust system, especially folded muffler

摘要

At least the circumferential wall (2) includes indentations (4) and/or protrusions (4) to reduce surface sound emission. Preferably the indentations and/or protrusions are provided on an enclosed circumferential section (I, II, III) and form a uniform pattern of spherical cups or grooves.