US Patent 10473030 Acoustic panel of turbine engine

An aircraft engine includes a rotating structure and a casing circumferentially surrounding the rotating structure. The aircraft engine further includes an acoustic panel for noise reduction circumferentially surrounding the rotating structure. The acoustic panel is disposed proximal the casing. Furthermore, the acoustic panel includes a plurality of acoustic panel members. In addition, the acoustic panel is secured to the casing by at least one securement mechanism such that the acoustic panel is substantially circumferentially fixed relative to the casing.