(19)

(11)

EP 3 750 326 A1

(12)

(43) Date of publication: 16.12.2020 Bulletin 2020/51 (21) Application number: 19715206.9 (22) Date of filing: 06.02.2019

(51) International Patent Classification (IPC):  H04R 1/28(2006.01) G10K 11/00(2006.01) G10K 11/172(2006.01) (86) International application number: PCT/IB2019/050958 (87) International publication number: WO 2019/155381 (15.08.2019 Gazette 2019/33)

(84) Designated Contracting States: 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 States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 06.02.2018 PT 2018110552 (71) Applicant: Artnovion, Lda 4590-628 Paços de Ferreira (PT)	(72) Inventor: MENDES SILVA CASTRO, Jorge Manuel 2785-723 São Domingos De Rana (PT) (74) Representative: Patentree  Edificio Net Rua de Salazares, 842 4149-002 Porto 4149-002 Porto (PT)