US 11,854,523 B2
Sound absorber, sound absorbing panel and sound absorbing wall
Masaki Gomi, Tokyo (JP); and Yudai Taira, Tokyo (JP)
Assigned to Pixie Dust Technologies, Inc., Tokyo (JP)
Filed by Pixie Dust Technologies, Inc., Tokyo (JP)
Filed on Apr. 6, 2023, as Appl. No. 18/296,656.
Application 18/296,656 is a continuation of application No. PCT/JP2022/026161, filed on Jun. 30, 2022.
Claims priority of application No. 2021-129497 (JP), filed on Aug. 6, 2021; application No. 2021-196557 (JP), filed on Dec. 2, 2021; and application No. 2022-036141 (JP), filed on Mar. 9, 2022.
Prior Publication US 2023/0260496 A1, Aug. 17, 2023
Int. Cl. G10K 11/172 (2006.01)
CPC G10K 11/172 (2013.01) 18 Claims
OG exemplary drawing
 
1. A sound absorber comprising a plurality of cavities mutually different in at least one of shape and size, wherein
a wall of a first cavity included in the plurality of cavities includes a first region and a second region, wherein a plurality of through-holes connecting an interior of the first cavity to an exterior of the first cavity is formed in the first region, and wherein no through-holes connecting the interior of the first cavity and the exterior of the first cavity is formed in the second region adjacent to the first region,
a wall of a second cavity included in the plurality of cavities includes a third region and a fourth region, wherein a plurality of through-holes connecting an interior of the second cavity to an exterior of the second cavity is formed in the third region, and wherein no through-holes connecting the interior of the second cavity and the exterior of the second cavity is formed in the fourth region adjacent to the third region, and
size of through-holes in the first region is different from size of through-holes in the third region.