(19)

(11)

EP 1 174 002 A2

(12)

(88) Date of publication A3: 08.02.2001 (43) Date of publication: 23.01.2002 Bulletin 2002/04 (21) Application number: 00925465.7 (22) Date of filing: 28.04.2000

(51) International Patent Classification (IPC)7: H04R 9/04, H04R 9/06, H04R 9/02 (86) International application number: PCT/GB0001/484 (87) International publication number: WO 0067/523 (09.11.2000 Gazette 2000/45)

(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: 29.04.1999 GB 9910217 20.07.1999 GB 9916837 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventors: BANK, Graham WoodbridgeSuffolk IP12 4LS (GB) ROBERTS, Martin Bury St. EdmundsSuffolk IP33 2QJ (GB) (74) Representative: Maguire, Peter Albert et al Maguire & Co. 5 Crown Street St. Ives, Cambridgeshire PE27 5EB St. Ives, Cambridgeshire PE27 5EB (GB)