(19)

(11)

EP 1 234 478 A2

(12)

(88) Date of publication A3: 10.05.2002 (43) Date of publication: 28.08.2002 Bulletin 2002/35 (21) Application number: 00985445.6 (22) Date of filing: 28.11.2000

(51) International Patent Classification (IPC)7: H04R 1/40, H04R 1/22, H04R 7/04, G09F 27/00 (86) International application number: PCT/GB0004/510 (87) International publication number: WO 0104/1498 (07.06.2001 Gazette 2001/23)

(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: 02.12.1999 GB 9928456 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventor: BUOS, Andreas Huntingdon,Cambridgeshire PE29 1LR (GB) (74) Representative: Maguire, Peter Albert et al Maguire & Co.5 Crown Street St. Ives, Cambridgeshire PE27 5EB St. Ives, Cambridgeshire PE27 5EB (GB)