EP 4068276 A1 20221005 - ACOUSTIC ABSORBING STRUCTURES
Title (en)
ACOUSTIC ABSORBING STRUCTURES
Title (de)
AKUSTIKABSORBIERENDE STRUKTUREN
Title (fr)
STRUCTURES D'ABSORPTION ACOUSTIQUE
Publication
Application
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)
- [XYI] US 3734234 A 19730522 - WIRT L
- [XI] GB 2290672 A 19960103 - B & W LOUDSPEAKERS [GB]
- [Y] EP 2605238 A2 20130619 - ROLLS ROYCE DEUTSCHLAND [DE]
- [Y] CN 109300464 A 20190201 - NANJING UNIVERSITY OF TECHNOLOGY
- [A] US 2015041247 A1 20150212 - ICHIHASHI FUMITAKA [US]
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)
DOCDB simple family (application)
EP 21275034 A 20210329