Sound damping and cooling car cladding - has strips shaped into parabolic sections hinged to axes between open and shut positions

摘要

The sound dampenning cladding admits cooling air flow in direction opposite to sound impact, partic. for a motor vehicle radiator. In one or more air passages part of the wall is formed by a parabolic section with its apex upstream and with the apical curve protruding into the passage, so as to shield a trough-shaped recess containing a noise-absorbent insert. Each parabolic section (10() is formed by a shaped strip (130-132), hinged, pref. coaxially, to the parabola axis (114). It is pref. steplessly adjustable between the shut and fully-open positions.