(19)

(11)

EP 0 965 245 A1

(12)

(43) Date of publication: 22.12.1999 Bulletin 1999/51 (21) Application number: 98907080.0 (22) Date of filing: 27.02.1998

(51) International Patent Classification (IPC):  H04R 7/ 10( . ) H04R 7/ 04( . ) (86) International application number: PCT/GB1998/000621 (87) International publication number: WO 1998/039947 (11.09.1998 Gazette 1998/36)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB IE IT LI NL PT SE Designated Extension States: LT LV RO SI (30) Priority: 04.03.1997 GB 19970004486 (60) Divisional application: 01202058.2 / 1133212 (71) Applicant: New Transducers Limited Huntingdon, Cambridgeshire PE18 6ED (GB)	(72) Inventors: AZIMA, Henry Cambridge CB2 2TT (GB) COLLOMS, Martin London NW2 2DA (GB) HARRIS, Neil Cambridge CB2 5JF (GB) (74) Representative: Maguire, Peter Albert, et al  Maguire & Co. 5 Crown Street St. Ives, Cambridgeshire PE17 4EB St. Ives, Cambridgeshire PE17 4EB (GB)