The invention relates to an acoustic attenuation panel (40) comprising:-a perforated acoustic wall (42),-a first honeycomb structure (44) connected to the perforated acoustic wall (42) having a plurality of acoustic cells (440) delimited by peripheral bulkheads (445),-a second honeycomb structure (48) having a plurality of acoustic cells (480) delimited by peripheral bulkheads (485),-a spacer (46) having a plurality of large perforations (460), and a spacer (46) interposed between the first honeycomb structure (44) and the second honeycomb structure (48), each acoustic unit (440) of the first honeycomb structure and each acoustic unit (480) of the at least one second honeycomb structure (48) being disposed opposite a unique perforation (460) of the spacer (46).
本发明涉及一种声衰减板(40),包括:‑穿孔声学壁(42),‑第一蜂窝结构(44),连接到所述穿孔声学壁(42),具有由周边隔板(445)界定的多个声学单元(440),‑第二蜂窝结构(48),具有由周边隔板(485)界定的多个声学单元(480),‑隔片(46),具有多个大穿孔(460),所述隔片介于所述第一蜂窝结构(44)与所述第二蜂窝结构(48)之间,所述第一蜂窝结构的每个声学单元(440)和所述至少一个第二蜂窝结构(48)的每个声学单元(480)被设置为与所述隔片(46)的独特穿孔(460)相对。
Acoustic attenuation panel for low frequency waves
用于低频波的声衰减板
2022-05-27
Patent
Electronic Resource
Chinese
IPC: | B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / F02K JET-PROPULSION PLANTS , Strahltriebwerke / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
ACOUSTIC ATTENUATION PANEL AND ITS MANUFACTURING METHODS
European Patent Office | 2022
|Sound attenuation panel for aircraft having a combination of acoustic attenuation properties
European Patent Office | 2022
|