An acoustic absorption structure and an aircraft propulsion assembly

The invention relates to an acoustic absorption structure that includes: at least one acoustic element 40 which has at least one cavity delimited by at least one enclosure 48 comprising at least one first drainage orifice 64. 64' passing through the enclosure 48, and a rotational indexing system 66 making it possible to position the acoustic element 40 so that at least one first drainage orifice 64 is positioned in proximity to or at a lowest point of the cavity. An aircraft propulsion assembly including such an acoustic absorption structure is also described. 本发明的主题是一种吸声结构，所述吸声结构包括：-至少一个声学元件(40)，所述至少一个声学元件具有由至少一个封壳(48)界定的至少一个腔体，所述封壳包括穿过所述封壳(48)的至少一个第一排水孔口(64，64')，以及-旋转指向系统(66)，所述旋转指向系统使得能够将声学元件(40)定位成使得至少一个第一排水孔口(64)定位在所述腔体的最低点处或附近。一种包括这种吸声结构的飞行器推进组件也是本发明的主题。