US 11,915,679 B2
Continuous degree of freedom acoustic cores
Wendy Wenling Lin, Montgomery, OH (US); Michael Moses Martinez, Liberty Township, OH (US); Rudramuni Kariveerappa Majjigi, Cincinnati, OH (US); David Patrick Calder, Baltimore, MD (US); and Aaron Goldsholl, Liberty Township, OH (US)
Assigned to General Electric Company, Schenectady, NY (US); and MRA Systems, LLC, Wilmington, DE (US)
Filed by General Electric Company, Schenectady, NY (US); and MRA Systems, LLC, Wilmington, DE (US)
Filed on Dec. 2, 2021, as Appl. No. 17/540,341.
Application 17/540,341 is a continuation of application No. 16/415,754, filed on May 17, 2019, granted, now 11,227,576.
Application 16/415,754 is a continuation of application No. 15/421,935, filed on Feb. 1, 2017, granted, now 10,332,501, issued on Jun. 25, 2019.
Prior Publication US 2022/0093073 A1, Mar. 24, 2022
Int. Cl. G10K 11/172 (2006.01); G10K 11/168 (2006.01); B32B 3/12 (2006.01); B32B 7/12 (2006.01)
CPC G10K 11/172 (2013.01) [B32B 3/12 (2013.01); B32B 7/12 (2013.01); G10K 11/168 (2013.01); B32B 2305/022 (2013.01); B32B 2305/024 (2013.01); B32B 2307/102 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustic liner, comprising:
a face sheet;
a back sheet spaced from the face sheet; and
a core layer defining a cellular structure disposed between the face sheet and the back sheet, the core layer comprising:
a plurality of first resonant cells coupled to the back sheet, each of the first resonant cells comprising:
a first cell wall coupled to the back sheet along a first cell wall base edge, the first cell wall extending from the back sheet toward the face sheet, the first cell wall further coupled to the face sheet along a first cell wall top edge,
wherein the first cell wall of each of the first resonant cells comprises a surface extension that extends from a surface of the first cell wall to a distal end spaced from and disconnected from an opposing first cell wall, the face sheet, and the back sheet.