公开(公告)号：US20240379087A1

公开(公告)日：2024-11-14

申请号：US18691974

申请日：2022-08-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Nicole D. Petkovich ,  Yongbeom Seo ,  Tongyang Shi ,  Michael R. Berrigan ,  Michelle M. Mok ,  Seungkyu Lee ,  Jonathan H. Alexander

IPC: G10K11/165

Abstract: An acoustic article (10) comprising a porous layer (14) and an acoustic absorbing filler (18) embedded within the porous layer, and methods of making the same. The acoustic absorbing filler includes agglomerates comprising porous amorphous silica particles and a binder. The acoustic absorbing filler has a median sieved particle size of 100 i.un to 2000 i.un. The acoustic article has a normal incidence acoustic absorption of no less than 0.09 a at 400 Hz.

公开(公告)号：US20240212661A1

公开(公告)日：2024-06-27

申请号：US18288468

申请日：2022-04-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tatjana Stecenko ,  Olester Benson, Jr. ,  Tongyang Shi ,  Pingfan Wu ,  James M. Jonza

IPC: G10K11/162 ,  B29C59/04 ,  B29K101/10 ,  B29L31/00 ,  G10K11/172

CPC classification number: G10K11/162 ,  B29C59/046 ,  G10K11/172 ,  B29K2101/10 ,  B29K2995/0046 ,  B29K2995/0063 ,  B29K2995/0097 ,  B29L2031/721

Abstract: Provided is an acoustic article and related methods of manufacture and use. The acoustic article includes a continuous layer having a first elastic stiffness, and a plurality of distributed masses disposed on a major surface of the continuous layer having a second elastic stiffness. The second elastic stiffness can be less than the first elastic stiffness to provide an acoustic metamaterial displaying an anti-resonance peak at a frequency below 800 Hz. The acoustic article can be made using efficient and scalable processes for manufacturing low frequency acoustic barrier materials.