(19)

(11)

EP 1 757 162 A1

(12)

(43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 04754977.9 (22) Date of filing: 14.06.2004

(51) International Patent Classification (IPC):  H04R 11/04(2006.01) H04R 11/02(2006.01) (86) International application number: PCT/US2004/018570 (87) International publication number: WO 2006/001792 (05.01.2006 Gazette 2006/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (71) Applicant: Knowles Electronics, LLC Itasca, IL 60143 (US)	(72) Inventors: MILLER, Thomas, Edward 05 (US) LLAMAS-YOUNG, Evan Algonquin, IL 60102 (US) (74) Representative: Dunlop, Brian Kenneth Charles et al Wynne-Jones, Lainé & James 22 Rodney Road Cheltenham Gloucestershire GL50 1JJ Cheltenham Gloucestershire GL50 1JJ (GB)