초록

A sound insulation chamber delimits a gaseous flow channel and including resonant cavities housed within a double wall. The cavity vents are ducts which open into the channel flush with the inner wall and project into the interior of the cavities.

대표청구항 ▼

A chamber for attenuating the acoustical energy propagating within a channel traversed by a gaseoue flow, comprising two substantially coaxial shells, wherein the inner wall of the inner shell delimits the flow channel, the space between the two shells being divided by partitions which separate inde

A chamber for attenuating the acoustical energy propagating within a channel traversed by a gaseoue flow, comprising two substantially coaxial shells, wherein the inner wall of the inner shell delimits the flow channel, the space between the two shells being divided by partitions which separate independent annular cavities each of which communicates with the channel through at least one opening provided in the inner shell, and said cavities thus forming annular acoustic resonators which attenuate, in a given frequency range, the acoustical energy propagating in the channel, said chamber being characterized by the fact that each opening opens into the corresponding cavity through a bent duct having two angularly related branches which extend into the interior of said cavity, one of said branches being joined to the inner shell and opening into the channel flush with said inner wall, and the other of its branches extending substantially parallel to the axis of the channel and opening into said cavities.