(19)

(11)

EP 1 034 689 A1

(12)

(43) Date of publication: 13.09.2000 Bulletin 2000/37 (21) Application number: 98958231.7 (22) Date of filing: 22.10.1998

(51) International Patent Classification (IPC)7: H04R 3/00, H03G 9/16, G10K 11/178 (86) International application number: PCT/EP9806/720 (87) International publication number: WO 9921/395 (29.04.1999 Gazette 1999/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IE IT LI NL SE (30) Priority: 22.10.1997 DE 19746645 (71) Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V. 80636 München (DE)	(72) Inventors: LEISTNER, Philip D-71272 Renningen (DE) KRÜGER, Jan D-70563 Stuttgart (DE) (74) Representative: Gagel, Roland, Dr.  Patentanwalt Dr. Roland Gagel,Landsberger Strasse 480a 81241 München 81241 München (DE)