Sound absorbers for airframe components

Sound absorbers and airframe components comprising such sound absorbers are disclosed. In one embodiment, an airframe component comprises an aerodynamic surface (48) and a sound absorber (38). The sound absorber (38) comprises a perforated panel (40) having a front side exposed to an ambient environment outside of the airframe component and an opposite back side. The panel (40) comprises perforations extending through a thickness of the panel for permitting passage of sound waves therethrough. The sound absorber (38) also comprises a boundary surface spaced apart from the perforated panel. The boundary surface and the back side of the perforated panel (40) at least partially define a cavity in the airframe component for attenuating some of the sound waves entering the cavity via the perforations in the perforated panel (40). 公开了吸声器以及包括此类吸声器的机身部件。在个实施例中，机身部件包括空气动力表面(48)和吸声器(38)。吸声器(38)包括穿孔面板(40)，该穿孔面板(40)具有暴露于机身部件外面周围环境的正面和相对的背面。面板(40)包括延伸穿过面板的厚度以允许声波从中通过的穿孔。吸声器(38)还包括与穿孔面板间隔开的边界表面。边界表面和穿孔面板(40)的背面至少部分地在所述机身部件