(19)

(11)

EP 1 151 632 A1

(12)

(43) Date of publication: 07.11.2001 Bulletin 2001/45 (21) Application number: 00902718.6 (22) Date of filing: 07.02.2000

(51) International Patent Classification (IPC)7: H04R 9/06, H04R 9/04, H04R 7/16 (86) International application number: PCT/GB0000/333 (87) International publication number: WO 0047/013 (10.08.2000 Gazette 2000/32)

(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: 06.02.1999 GB 9902585 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventors: BANK, Graham WoodbridgeSuffolk IP12 4LS (GB) MORECROFT, Denis Cambridgeshire PE29 3QD (GB) ROBERTS, Martin Suffolk IP33 2QJ (GB) OWEN, Neil, Simon BuckdenCambridgeshire PE18 9TS (GB) (74) Representative: Hartwell, Ian Peter et al 5 Crown Street St. Ives,Cambridgeshire PE27 5EB St. Ives,Cambridgeshire PE27 5EB (GB)