A damping device for reducing pressure oscillations in a combustion system (1) according to the invention comprises at least a portion (9) provided with a first, outer wall (11), a second, inner wall (12), an intermediate plate (16) interposed between the ...

The air duct (12) comprises a Helmholtz resonator (14) having a damping element (30) which functions as a sound-dissipative material. The Helmholtz resonator is arranged along the depth dimension (T) of the air duct and is set away from the transition regi...

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 ...