US 12,029,628 B2
Apparatuses, systems, and methods for increasing or manipulating noise attenuation in hearing protection device
John Jenkins, Morris Plains, NJ (US); Scott Hutt, Morris Plains, NJ (US); Wei Sun, Shanghai (CN); Yongjun Chen, Shanghai (CN); and Lei Jiang, Shanghai (CN)
Assigned to HONEYWELL INTERNATIONAL INC., Morris Plains, NJ (US)
Appl. No. 17/309,879
Filed by HONEYWELL INTERNATIONAL INC., Morris Plains, NJ (US)
PCT Filed Feb. 20, 2019, PCT No. PCT/CN2019/075562
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/140315, PCT Pub. Date Jul. 9, 2020.
Claims priority of provisional application 62/786,810, filed on Dec. 31, 2018.
Prior Publication US 2022/0062056 A1, Mar. 3, 2022
Int. Cl. A61F 11/14 (2006.01); B29D 99/00 (2010.01); G10K 11/16 (2006.01); G10K 11/162 (2006.01)
CPC A61F 11/14 (2013.01) [B29D 99/00 (2013.01); G10K 11/162 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A protection cup for a hearing protection device, comprising:
an outer surface;
an inner surface on an opposite side from the outer surface; and
a plurality of fractal elements disposed on the inner surface, wherein the plurality of fractal elements comprise:
a plurality of first fractal elements protruding from the inner surface of the protection cup;
a plurality of second fractal elements protruding from the inner surface of the protection cup, wherein the plurality of first fractal elements and the plurality of second fractal elements form a plurality of regions on the inner surface; and
a plurality of third fractal elements, wherein each of the plurality of third fractal elements comprises a longitudinal segment and at least one transverse segment forming an H-shaped fractal element.