Noise suppressor eg for vehicular turbocharger duct

摘要

The noise suppressor 120 comprises a series of suppression chambers inside a hose 130, each suppression chamber communicating with a central internal duct via one or more apertures such that the combination of one chamber with its associated total aperture area produces different noise suppression characteristics from a combination of another chamber with its associated total aperture area. The chambers may be formed by a series of modular elements so that each chamber is bounded by parts of two adjacent modular elements and is separated from the next chamber by an internal wall of a modular portion. The apertures (147,151, fig. 10) may be inclined to the duct axis Two spaced-apart suppressors may be provided in the hose.