(19)

(11)

EP 4 825 057 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24829569.3 (22) Date of filing: 10.12.2024

(51) International Patent Classification (IPC):  H04R 1/40(2006.01) H04S 7/00(2006.01) H04R 3/12(2006.01) H04R 5/02(2006.01) (52) Cooperative Patent Classification (CPC): H04R 1/403; H04R 3/12; H04R 2203/12; H04R 5/02; H04R 2205/024; H04R 2205/022; H04S 7/302; H04S 2400/11 (86) International application number: PCT/GB2024/053066 (87) International publication number: WO 2025/125785 (19.06.2025 Gazette 2025/25)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 12.12.2023 GB 202318910 (71) Applicant: Airsound Ltd London SE11 5EL (GB)	(72) Inventors: FLETCHER, Daniel John Exeter, EX2 9AL (GB) FLETCHER, Edward Stuart Bognor Regis PO21 4HD (GB) (74) Representative: Wilson Gunn  Centurion House 129 Deansgate Manchester M3 3WR Manchester M3 3WR (GB)