(19)

(11)

EP 2 577 998 A1

(12)

(43) Date of publication: 10.04.2013 Bulletin 2013/15 (21) Application number: 11725405.2 (22) Date of filing: 03.06.2011

(51) International Patent Classification (IPC):  H04R 25/00(2006.01) (86) International application number: PCT/EP2011/059205 (87) International publication number: WO 2011/151447 (08.12.2011 Gazette 2011/49)

(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 (30) Priority: 08.06.2010 EP 10165305 04.06.2010 US 794172 (71) Applicant: GN Otometrics A/S 2630 Taastrup (DK)	(72) Inventor: HØST, Morten DK-2750 Ballerup (DK) (74) Representative: Zacco Denmark A/S  Hans Bekkevolds Allé 7 2900 Hellerup 2900 Hellerup (DK)