(19)

(11)

EP 0 934 679 A1

(12)

(43) Date of publication: 11.08.1999 Bulletin 1999/32 (21) Application number: 97929434.0 (22) Date of filing: 04.07.1997

(51) International Patent Classification (IPC):  H04R 1/ 08( . ) (86) International application number: PCT/GB1997/001806 (87) International publication number: WO 1999/002010 (14.01.1999 Gazette 1999/02)

(84) Designated Contracting States: DE DK FI FR GB NL SE (71) Applicant: Maxon Systems Inc. Ltd. Salford Redhill, Surrey RH1 5JP (GB)	(72) Inventor: SPENCER, Duncan Burnley, Lancashire BB10 4PH (GB) (74) Representative: Schmidt, Steffen J., Dipl.-Ing., et al  Wuesthoff & Wuesthoff, Patent- und Rechtsanwälte, Schweigerstrasse 2 81541 München 81541 München (DE)