H - Electricity – 04 – R
Patent
H - Electricity
04
R
179/35, 349/70
H04R 3/00 (2006.01) H04R 1/00 (2006.01) H04R 9/04 (2006.01) H04R 9/06 (2006.01)
Patent
CA 1214997
ABSTRACT: A loudspeaker system and a loudspeaker for use in a loud- speaker system for converting an n-bit digitized elec- tric signal into an acoustic signal. 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 sig- nificant bits. In accordance with the invention steps are proposed which enable such a transducer to be con- structed in a simple manner if the transducer is a mov- ing-coil loudspeaker (Fig. 2b) or if the transducer is a ribbon-type loudspeaker (Figs. 4b and 4c).
462944
Nieuwendijk Joris A.m.
Sanders Georgius B.j.
Van Gijsel Wilhelmus D.a.m.
Van Nieuwland Jacob M.
Fetherstonhaugh & Co.
N.v.philips'gloeilampenfabrieken
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