(19)

(11)

EP 4 739 984 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24740615.0 (22) Date of filing: 05.07.2024

(51) International Patent Classification (IPC):  G01H 9/00(2006.01) G02B 6/125(2006.01) (52) Cooperative Patent Classification (CPC): G02B 6/125; G01H 9/004; H04R 23/008 (86) International application number: PCT/NL2024/050369 (87) International publication number: WO 2025/014363 (16.01.2025 Gazette 2025/03)

(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: 07.07.2023 EP 23184252 (71) Applicant: Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek TNO 2595 DA 's-Gravenhage (NL)	(72) Inventors: HARMSMA, Peter Johan 2595 DA 's-Gravenhage (NL) QUESSON, Benoit André Jacques 2595 DA 's-Gravenhage (NL) VAN NEER, Paul Louis Maria Joseph 2595 DA 's-Gravenhage (NL) VAN DER HEIDEN, Maurits Sebastiaan 2595 DA 's-Gravenhage (NL) ALTMANN, Robert Karl 2595 DA 's-Gravenhage (NL) (74) Representative: V.O.  P.O. Box 87930 2508 DH Den Haag 2508 DH Den Haag (NL)