The conduit (5) has additional air inlets (6) along its length such that the radiated noise through and in the vicinity of each inlet is lower than the noise at a mouth (7). The level of radiated noise through one additional air inlet is identical to the o...

The device has a pipe section (1) formed by two semi-shells (3, 4) partitioned with longitudinal partition walls extending from a bottom wall to a sealing surface of the respective semi-shells. The partition walls contact at their free edges (12). Each edg...

The noise attenuation device comprises a pipe section (1) forming a section of the air inlet circuit of the turbocharger. It is fitted with a first group of external circumferential chambers (5) located in parallel about the pipe and communicating with it ...

The air decompression device (1) for balancing the pressure between the interior volume and the ambient environment during the opening of a door comprises a rigid body (2) delimiting an air passage opening (3) and a sealing flap (4) articulated to the body...

The noise attenuator consists of a number of annular chambers (6) positioned one after another round a section (5) of the intake pipe (3) and connected to it through apertures (7) to establish a link in the air flow between the pipe and the chambers. The c...