EP 3411874 A1 20181212 - LOW THICKNESS PERFORATED MILLE-FEUILLE ACOUSTIC RESONATOR FOR ABSORBING OR RADIATING VERY LOW ACOUSTIC FREQUENCIES
Title (en)
LOW THICKNESS PERFORATED MILLE-FEUILLE ACOUSTIC RESONATOR FOR ABSORBING OR RADIATING VERY LOW ACOUSTIC FREQUENCIES
Title (de)
PERFORIERTER MILLE-FEUILLE-AKUSTIKRESONATOR MIT GERINGER DICKE ZUR ABSORPTION ODER AUSSTRAHLUNG VON SEHR NIEDRIGEN AKUSTISCHEN FREQUENZEN
Title (fr)
RÉSONATEUR ACOUSTIQUE DE FAIBLE ÉPAISSEUR DE TYPE MILLE-FEUILLE PERFORÉ POUR L'ABSORPTION OU LE RAYONNEMENT ACOUSTIQUE TRÈS BASSES FRÉQUENCES
Publication
Application
Priority
- FR 1650926 A 20160205
- EP 2017052183 W 20170201
Abstract (en)
[origin: WO2017134125A1] The invention relates to an acoustic resonator comprising a resonating part (1) having a main perforation (2) extending in a propagation direction (21) and a series of lateral cavities (3) communicating with the main perforation (2) in such a way as to form thin acoustic resonators, each lateral cavity (3a, 3b, 3c…) opening onto the main perforation (2) along the entire periphery of a respective segment of said main perforation (2), and the lateral cavities (3) constituting lamina of a fluid so that the resonating part (1) has a "mille-feuille" structure comprising said fluid lamina and layers of a material of the resonant part (1) separating those fluid lamina. See figure 1.
IPC 8 full level
G10K 11/172 (2006.01)
CPC (source: EP US)
G10K 11/172 (2013.01 - EP US); G10K 11/168 (2013.01 - EP US)
Citation (search report)
See references of WO 2017134125A1
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)
WO 2017134125 A1 20170810; CN 108885863 A 20181123; EP 3411874 A1 20181212; FR 3047599 A1 20170811; FR 3047599 B1 20190524; JP 2019505016 A 20190221; SG 11201806610W A 20180927; US 2019035377 A1 20190131
DOCDB simple family (application)
EP 2017052183 W 20170201; CN 201780010064 A 20170201; EP 17706165 A 20170201; FR 1650926 A 20160205; JP 2018541121 A 20170201; SG 11201806610W A 20170201; US 201716075093 A 20170201