Global Patent Index - EP 4068276 A1

EP 4068276 A1 20221005 - ACOUSTIC ABSORBING STRUCTURES

Title (en)

ACOUSTIC ABSORBING STRUCTURES

Title (de)

AKUSTIKABSORBIERENDE STRUKTUREN

Title (fr)

STRUCTURES D'ABSORPTION ACOUSTIQUE

Publication

EP 4068276 A1 20221005 (EN)

Application

EP 21275034 A 20210329

Priority

EP 21275034 A 20210329

Abstract (en)

In some examples, an acoustic absorbing structure comprises a surface comprising an array of apertures, each aperture defining an opening for a corresponding channel, each channel forming a non-resonant acoustic attenuation structure with an axially decreasing cross-section over at least a portion of the length of the channel.

IPC 8 full level

G10K 11/172 (2006.01)

CPC (source: EP)

G10K 11/172 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 4068276 A1 20221005

DOCDB simple family (application)

EP 21275034 A 20210329