(19)

(11)

EP 1 159 731 A1

(12)

(43) Date of publication: 05.12.2001 Bulletin 2001/49 (21) Application number: 00907787.6 (22) Date of filing: 06.03.2000

(51) International Patent Classification (IPC)7: G10H 3/26 (86) International application number: PCT/GB0000/769 (87) International publication number: WO 0054/250 (14.09.2000 Gazette 2000/37)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.03.1999 GB 9905039 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventors: WARRINER, Mark Bedford MK41 7SE (GB) COLLOMS, Martin London NW2 2DA (GB) (74) Representative: Maguire, Peter Albert et al Maguire & Co.5 Crown Street St. Ives, Cambridgeshire PE27 5EB St. Ives, Cambridgeshire PE27 5EB (GB)