(19)
(11) EP 1 408 717 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.08.2004 Bulletin 2004/32

(43) Date of publication A2:
14.04.2004 Bulletin 2004/16

(21) Application number: 03255099.8

(22) Date of filing: 18.08.2003
(51) International Patent Classification (IPC)7: H04R 7/04, H04R 1/24
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 17.08.2002 GB 0219245
25.07.2003 GB 0317445

(71) Applicant: KH Technology Corporation
Georgetown, Grand Cayman (KY)

(72) Inventor:
  • Dodd, Mark
    Suffolk IP12 4DD (GB)

(74) Representative: Clayton-Hathway, Anthony 
Fry Heath & Spence LLP The Gables Massetts Road
Horley, Surrey RH6 7DQ
Horley, Surrey RH6 7DQ (GB)

   


(54) Combination loudspeaker unit


(57) A loudspeaker unit comprises, in combination, a pistonically driven diaphragm loudspeaker and a generally planar resonant panel loudspeaker, in which the plane of the resonant panel lies in the same orientation as an axis along which the diaphragm is pistonically driven. The resonant panel loudspeaker may be located behind the diaphragm loudspeaker, with the resonant panel loudspeaker functioning as a diffuse dipole, e.g. to generate surround sound reproduction, and the diaphragm loudspeaker located in the null of the dipole and functioning as an acoustic monopole, e.g. to generate imaged stereophonic sound reproduction.






Search report