公开(公告)号：US20230395056A1

公开(公告)日：2023-12-07

申请号：US18031854

申请日：2021-10-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Nicole D. Petkovich ,  Michelle M. K. Mok ,  Michael R. Berrigan ,  Jonathan H. Alexander ,  Samantha D. Smith ,  Yongbeom Seo ,  Daniel E. Johnson

IPC: G10K11/168 ,  G10K11/165

CPC classification number: G10K11/168 ,  G10K11/165

Abstract: Provided herein are acoustic articles (100) that include a porous layer (102) and heterogeneous filler (104) received in the porous layer. The heterogeneous filler is substantially non-porous and present in an amount of from 0.25% to 7% by volume relative to the total volume of the porous layer and has a specific surface area of from 0.01 m2/g to 1 m2/g. The acoustic article has a flow resistance of from 500 MKS Rayls to 12,000 MKS Rayls.