(19)

(11)

EP 4 327 562 A1

(12)

(43) Date of publication: 28.02.2024 Bulletin 2024/09 (21) Application number: 22791178.1 (22) Date of filing: 24.02.2022

(51) International Patent Classification (IPC):  H04R 1/02(2006.01) H04R 9/06(2006.01) B29C 73/16(2006.01) H04R 7/02(2006.01) H04R 9/08(2006.01) B29L 31/38(2006.01) (52) Cooperative Patent Classification (CPC): H04R 29/001; H04R 29/004; H04R 2499/11 (86) International application number: PCT/FI2022/050123 (87) International publication number: WO 2022/223872 (27.10.2022 Gazette 2022/43)

(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: 23.04.2021 GB 202105814 (71) Applicant: Nokia Technologies Oy 02610 Espoo (FI)	(72) Inventors: OZCAN, Koray Farnborough Hampshire GU14 6QF (GB) VILERMO, Miikka, Tapani 37200 Siuro (FI) TOSSAVAINEN, Antero 00100 Helsinki (FI) (74) Representative: Nokia EPO representatives  Nokia Technologies Oy Karakaari 7 02610 Espoo 02610 Espoo (FI)