EP 4334931 A2 20240313 - ACOUSTIC METAMATERIAL AND METHOD FOR THE ADDITIVE MANUFACTURING THEREOF
Title (en)
ACOUSTIC METAMATERIAL AND METHOD FOR THE ADDITIVE MANUFACTURING THEREOF
Title (de)
AKUSTISCHES METAMATERIAL UND VERFAHREN ZUR GENERATIVEN FERTIGUNG DAVON
Title (fr)
META-MATERIAU ACOUSTIQUE ET PROCEDE POUR SA FABRICATION ADDITIVE
Publication
Application
Priority
- CA 3117010 A 20210504
- CA 3117015 A 20210504
- FR 2022050849 W 20220503
Abstract (en)
[origin: WO2022234228A2] The invention relates to an acoustic metamaterial (100, 100'), as well as to a method for manufacturing same. The acoustic metamaterial comprises a plurality of channels (101) or columns (101') each having the same cross-section with a hydraulic radius between 5 and 300 µm, which channels or columns are arranged with a periodic spacing (t,s) between 2 and 600 µm. This results in a highly dense network that can provide optimal acoustic absorption and/or impedance over a wide frequency range. The method for manufacturing same comprises additive manufacturing with a plurality of consecutive material deposition steps to form, in each step, a layer (203) comprising a plurality of periodically repeated cells (204) separated by walls (104). The layers (203) deposited in the consecutive material deposition steps are stacked with their respective cells (204) aligned to form channels (101, 206').
IPC 8 full level
G10K 11/162 (2006.01); B29C 64/00 (2017.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); F02C 7/045 (2006.01); F02K 1/82 (2006.01)
CPC (source: EP)
B33Y 80/00 (2014.12); F02C 7/24 (2013.01); G10K 11/162 (2013.01); F05D 2250/283 (2013.01); F05D 2260/963 (2013.01)
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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022234228 A2 20221110; WO 2022234228 A3 20230119; EP 4334931 A2 20240313
DOCDB simple family (application)
FR 2022050849 W 20220503; EP 22729251 A 20220503