(19)

(11)

EP 1 151 631 A2

(12)

(88) Date of publication A3: 25.01.2001 (43) Date of publication: 07.11.2001 Bulletin 2001/45 (21) Application number: 00903798.7 (22) Date of filing: 09.02.2000

(51) International Patent Classification (IPC)7: H04R 7/06, H04R 9/06 (86) International application number: PCT/GB0000/389 (87) International publication number: WO 0048/428 (17.08.2000 Gazette 2000/33)

(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: 11.02.1999 GB 9903044 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventors: BANK, Graham Woodbridge,Suffolk IP12 4LS (GB) FORDHAM, Julian Huntingdon,Cambridgeshire PE18 9RE (GB) (74) Representative: Maguire, Peter Albert et al Maguire Boss,5 Crown Street St. Ives,Cambridgeshire PE27 5EB St. Ives,Cambridgeshire PE27 5EB (GB)