(19)

(11)

EP 1 138 175 A2

(12)

(88) Date of publication A3: 31.08.2000 (43) Date of publication: 04.10.2001 Bulletin 2001/40 (21) Application number: 99958386.7 (22) Date of filing: 09.12.1999

(51) International Patent Classification (IPC)7: H04R 7/04, H04R 9/06 (86) International application number: PCT/GB9904/080 (87) International publication number: WO 0035/242 (15.06.2000 Gazette 2000/24)

(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: 09.12.1998 GB 9827040 14.01.1999 GB 9900674 (71) Applicant: New Transducers Limited London SW3 3QH (GB)	(72) Inventor: AZIMA, Henry Cambridge CB2 2TT (GB) (74) Representative: Maguire, Peter Albert et al Maguire Boss,5 Crown Street St. Ives,Cambridgeshire PE27 5EB St. Ives,Cambridgeshire PE27 5EB (GB)