(19)

(11)

EP 1 121 833 A1

(12)

(43) Date of publication: 08.08.2001 Bulletin 2001/32 (21) Application number: 99949152.5 (22) Date of filing: 12.10.1999

(51) International Patent Classification (IPC)7: H04R 7/06, H04R 7/20, H04R 9/04, H04R 1/28 (86) International application number: PCT/GB9903/209 (87) International publication number: WO 0022/877 (20.04.2000 Gazette 2000/16)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 13.10.1998 GB 9822246 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventor: AZIMA, Henry Cambridge CB2 2TT (GB) (74) Representative: Maguire, Peter Albert et al Maguire Boss,5 Crown Street St. Ives,Cambridgeshire PE27 5EB St. Ives,Cambridgeshire PE27 5EB (GB)