(19)

(11)

EP 1 077 012 A1

(12)

(43) Date of publication: 21.02.2001 Bulletin 2001/08 (21) Application number: 99907760.5 (22) Date of filing: 10.03.1999

(51) International Patent Classification (IPC)7: H04R 1/10, H04R 5/033 (86) International application number: PCT/GB9900/720 (87) International publication number: WO 9948/324 (23.09.1999 Gazette 1999/38)

(84) Designated Contracting States: AT CH DE DK FR GB IT LI NL SE (30) Priority: 18.03.1998 GB 9805618 (71) Applicant: NCT Group, Inc. Linthicum, MD 21090-1206 (US)	(72) Inventor: JONES, Owen Chattisham,Ipswich IP8 3PX (GB) (74) Representative: Nash, Keith Wilfrid et al KEITH W. NASH & Co.,90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)