MULTI-LAYER ACOUSTIC TREATMENT PANEL

摘要

The invention relates to a multi-layer acoustic treatment panel (100) comprising a first core having an alveolar structure (102) sandwiched between a perforated skin (104) and an intermediate skin (106), and a second core having an alveolar structure (108) sandwiched between the intermediate skin and a whole skin (110). The perforated skin comprises at least one pair of highly porous areas having a perforation rate higher than that of the rest of the perforated skin and consisting of an inlet area (114a) and an outlet area (114b) that are longitudinally distanced from each other, the highly porous areas of the same pair communicating, through the first core with an alveolar structure and the intermediate skin, with the two ends of a sound wave transmission channel (118) in the second core that has an alveolar structure.