An acoustic attenuation panel includes a perforated acoustic wall, a first honeycomb structure coupled to the perforated acoustic wall and including a plurality of acoustic cells defined by peripheral partitions, a second honeycomb structure including a plurality of acoustic cells defined by peripheral partitions, and a septum which includes a plurality of macro-perforations and is positioned between the first honeycomb structure and the second honeycomb structure. Each acoustic cell of the first honeycomb structure and each acoustic cell of the at least second honeycomb structure are arranged opposite a single perforation of the septum.
ACOUSTIC ATTENUATION PANEL FOR LOW-FREQUENCY WAVES
2022-07-21
Patent
Electronic Resource
English
ACOUSTIC ATTENUATION PANEL AND ITS MANUFACTURING METHODS
European Patent Office | 2022
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