公开(公告)号：US10352210B2

公开(公告)日：2019-07-16

申请号：US15503906

申请日：2015-09-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas P. Hanschen ,  Jonathan H. Alexander ,  Paul A. Martinson ,  John Stuart Bolton ,  Seungkyu Lee ,  Thomas Herdtle ,  Ronald W. Gerdes

IPC: F01N1/02 ,  F01N1/00 ,  F02M35/12 ,  G10K11/16 ,  F01N13/02 ,  F24F13/24

Abstract: Provided acoustic devices include an external housing defining an expansion chamber and a wall extending through and partitioning the expansion chamber into a central chamber and a peripheral chamber adjacent the central chamber, wherein an inlet and outlet communicate with the central chamber, and wherein the wall includes a plurality of apertures formed therethrough to allow air movement to and from the central and expansion chambers, the plurality of apertures sized to provide an average flow resistance ranging from 100 MKS Rayls to 5000 MKS Rayls. The acoustic devices advantageously show significant sound attenuation while streamlining air flow to reduce pressure drop across the expansion chamber.

公开(公告)号：US20170241310A1

公开(公告)日：2017-08-24

申请号：US15503906

申请日：2015-09-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas P. Hanschen ,  Jonathan H. Alexander ,  Paul A. Martinson ,  John Stuart Bolton ,  Seungkyu Lee ,  Thomas Herdtle ,  Ronald W. Gerdes

IPC: F01N1/00 ,  F24F13/24 ,  F02M35/12 ,  F01N1/02 ,  F01N13/02

CPC classification number: F01N1/006 ,  F01N1/026 ,  F01N13/02 ,  F01N2470/02 ,  F01N2470/24 ,  F01N2490/155 ,  F02M35/1216 ,  F02M35/1255 ,  F24F13/24 ,  F24F2013/245 ,  G10K11/161

Abstract: Provided acoustic devices include an external housing defining an expansion chamber and a wall extending through and partitioning the expansion chamber into a central chamber and a peripheral chamber adjacent the central chamber, wherein an inlet and outlet communicate with the central chamber, and wherein the wall includes a plurality of apertures formed therethrough to allow air movement to and from the central and expansion chambers, the plurality of apertures sized to provide an average flow resistance ranging from 100 MKS Rayls to 5000 MKS Rayls. The acoustic devices advantageously show significant sound attenuation while streamlining air flow to reduce pressure drop across the expansion chamber.