(19)

(11)

EP 1 172 019 A2

(12)

(88) Date of publication A3: 08.03.2001 (43) Date of publication: 16.01.2002 Bulletin 2002/03 (21) Application number: 00927419.2 (22) Date of filing: 28.04.2000

(51) International Patent Classification (IPC)7: H04R 17/00 (86) International application number: PCT/GB0001/485 (87) International publication number: WO 0067/525 (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 9910216 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventor: AZIMA, Henry Cambridge CB2 2TT (GB) (74) Representative: Maguire, Peter Albert  Maguire Boss, 5 Crown Street St. Ives, Cambridgeshire PE27 5EB St. Ives, Cambridgeshire PE27 5EB (GB)