公开(公告)号：US20210142774A1

公开(公告)日：2021-05-13

申请号：US16681149

申请日：2019-11-12

Applicant: Hexcel Corporation

Inventor： Merid Minasse HAILE ,  Lisa Diane BOWEN ,  Clark Russell SMITH

IPC: G10K11/162 ,  B32B3/12 ,  B32B27/06 ,  B32B7/12 ,  B32B37/12

Abstract: Acoustic honeycomb structures that include cells in which a friction-locking insertion process is used to locate acoustic barriers within honeycomb cells to provide multiple degree of freedom (MDOF) acoustic liners having a variety of acoustic resonator depths. Solid polymer films are formed into acoustic barrier caps. The acoustic barrier caps are friction-locked and bonded to cell walls at one or more cell depths to form acoustically reflective hard walls that form effective bottom ends for acoustic resonators.