(19)

(11)

EP 1 310 136 A2

(12)

(88) Date of publication A3: 24.10.2002 (43) Date of publication: 14.05.2003 Bulletin 2003/20 (21) Application number: 01959715.2 (22) Date of filing: 10.08.2001

(51) International Patent Classification (IPC)7: H04R 19/00 (86) International application number: PCT/US0125/184 (87) International publication number: WO 0201/5636 (21.02.2002 Gazette 2002/08)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 11.08.2000 US 637401 20.07.2001 US 910110 (71) Applicant: Knowles Electronics, LLC Itasca, Illinois 60143 (US)	(72) Inventors: PEDERSEN, Michael Gaithersburg, MD 20878 (US) LOEPPERT, Peter, V. Hoffman Estates, IL 60195 (US) LEE, Sung Bok Chicago, IL 60607 (US) (74) Representative: Wynne-Jones, John Vaughan et al Wynne-Jones, Lainé & James,Essex Place,22 Rodney Road Cheltenham GL50 1JJ Cheltenham GL50 1JJ (GB)