(19)

(11)

EP 0 498 794 A1

(12)

(43) Date of publication: 19.08.1992 Bulletin 1992/34 (21) Application number: 90907511.0 (22) Date of filing: 09.04.1990

(51) International Patent Classification (IPC):  H04R 5/ 02( . ) (86) International application number: PCT/NL1990/000043 (87) International publication number: WO 1991/015934 (17.10.1991 Gazette 1991/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (71) Applicant: OLIEMULLER, Robert, Jurrien NL-1057 BK Amsterdam (NL)	(72) Inventor: OLIEMULLER, Robert, Jurrien NL-1057 BK Amsterdam (NL)