Dashboard for motor vehicle, has stiffening rib placed under support plate, and elongated tube with orifice for communication via plate with passenger compartment, where tube constitutes acoustic resonator tuned on preset low frequency

摘要

The dashboard has a stiffening rib (9) arranged under a support plate (5) in a zone closer to a front windshield (4) and behind a frontal fire wall (6). An elongated tube has an orifice for communication of the tube via the plate with the interior of a passenger compartment. The rib and plate delimit walls of the tube whose dimensions depend on the size of the orifice to constitute an acoustic resonator tuned on a preset low frequency.