EP 3769302 A1 20210127 - POROUS ACOUSTIC PHASE MASK
Title (en)
POROUS ACOUSTIC PHASE MASK
Title (de)
PORÖSE AKUSTISCHE PHASENMASKE
Title (fr)
MASQUE DE PHASE ACOUSTIQUE POREUX
Publication
Application
Priority
- FR 1852569 A 20180323
- EP 2019057427 W 20190325
Abstract (en)
[origin: WO2019180270A1] The invention relates to an acoustic phase mask, the phase mask having a variation of the acoustic index n, characterized in that the phase mask comprises a body comprising: - at least one matrix formed by a deformable solid material, having a shear modulus of less than 10 MPa, and - pores formed in the matrix, the pores being predominantly filled with gas, the deformable solid material extending between the pores, the body having a porosity φ of less than or equal to 50%, and a controlled porosity φ gradient leading to a variation of the acoustic index n spatially in the body.
IPC 8 full level
G10K 11/165 (2006.01); B01J 2/06 (2006.01)
CPC (source: EP US)
C08J 9/0023 (2013.01 - US); C08J 9/40 (2013.01 - US); G10K 11/165 (2013.01 - EP); G10K 11/30 (2013.01 - US); C08J 2201/032 (2013.01 - US); C08J 2201/036 (2013.01 - US); C08J 2203/08 (2013.01 - US); C08J 2203/202 (2013.01 - US); C08J 2205/026 (2013.01 - US); C08J 2205/048 (2013.01 - US); C08J 2333/08 (2013.01 - US); C08J 2383/04 (2013.01 - US)
Citation (search report)
See references of WO 2019180270A1
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 2019180270 A1 20190926; EP 3769302 A1 20210127; FR 3079340 A1 20190927; FR 3079340 B1 20200320; US 2021142778 A1 20210513
DOCDB simple family (application)
EP 2019057427 W 20190325; EP 19712210 A 20190325; FR 1852569 A 20180323; US 201917040662 A 20190325