(19)
(11) EP 0 256 593 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.06.1988 Bulletin 1988/23

(43) Date of publication A2:
24.02.1988 Bulletin 1988/08

(21) Application number: 87201485

(22) Date of filing: 12.09.1984
(84) Designated Contracting States:
DE FR GB SE

(30) Priority: 15.09.1983 NL 8303184

(71) Applicant: N.V. Philips' Gloeilampenfabrieken
 ()

(72) Inventors:
  • Nieuwendijk, Jorus A. M.
     ()
  • van Gijsel, Wilhelmus D. A. M.
     ()
  • Sanders, Georgius B. J.
     ()
  • van Nieuwland,Jacob M.
     ()

   


(54) Loudspeaker system and loudspeaker for converting an n-bit digitalized electric signal into an acoustic signal


(57) An electrodynamic transducer (1) for use in a loudspeaker system for converting an n-bit digitized electric signal (11) into an acoustic signal comprises n voice-coil devices (4.1, 4.2, ... 4.n) which cooperate with a magnet system (3). The voice-coil devices each comprise a conductor whose length is the same for all the voice-coil devices. The areas of the perpendicular cross-sections of the conductors increase each time by a factor of two starting from the voice-coil device (4.n) corresponding to the least significant bit and going to voice-coil devices corresponding to consecutive more sig­nificant bits. In accordance with the invention steps are proposed which enable such a transducer to be con­structed in a simple manner if the transducer is a ribbon-type loudspeaker.







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