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William H Hogeboom, Gerald W Bielak: Aircraft engine acoustic liner. The Boeing Company, Christensen O Connor Johnson & Kindness PLLC, July 21, 1998: US05782082 (26 worldwide citation)

A middle layer (22) having partitioned cavities (28) is sandwiched between an imperforate sheet (24) and an optional perforate sheet (26) to form a low resistance acoustic liner (22). A preferred method of manufacture of the low resistance acoustic liner (20) uses aspects of the buried septum techni ...


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William H Hogeboom, Gerald W Bielak: Aircraft engine acoustic liner and method of making the same. The Boeing Company, August 30, 2001: US20010017232-A1

A middle layer (22) having partitioned cavities (28) is sandwiched between an imperforate sheet (24) and an optional perforate sheet (26) to form a low resistance acoustic liner (22). A preferred method of manufacture of the low resistance acoustic liner (20) uses aspects of the buried septum techni ...