Sound absorbing wheel-housing cover

摘要

The cover has chambers (4) in a flat surface, which each have at least one breakthrough (8). The breakthroughs are formed as slots (8), the length of which is many times greater than the width. The cover (6) is made of an elastomer or soft bendable material, so that the slot walls are movable relatively to one another. The cover can be of rubber or rubber with a textile inlay, and has a thickness pref. of 2 mm. The width of the slot is pref. 0.4 mm and the length pref. 20-40 mm. Impurities which fall into the chambers, which form Helmholtz resonators (18), are, with the passage of time, removed by spray water out of the chambers, the water flowing through outflow apertures (12).