Acoustic barrier cap in acoustic honeycomb

An acoustic honeycomb structure comprising cells in which an acoustic barrier is positioned within the honeycomb cell using a friction lock insertion process to provide a multiple degree of freedom (MDOF) acoustic liner with multiple acoustic resonator depths. The solid polymer film forms an acoustic barrier cap. The acoustic barrier cap is frictionally locked at one or more cell depths and bonded to cell walls to form an acoustically reflective hard wall that forms an active bottom end of the acoustic resonator. 声学蜂窝结构，所述声学蜂窝结构包括单元，在所述单元中使用摩擦锁定插入过程将声学屏障定位在蜂窝单元内以提供具有多种声学谐振器深度的多自由度(MDOF)声学衬里。实心聚合物膜形成声学屏障帽。所述声学屏障帽以一种或多种单元深度被摩擦锁定且结合到单元壁以形成声学反射硬壁，所述声学反射硬壁形成声学谐振器的有效底端。