EP 0256593 A3 19880608 - LOUDSPEAKER SYSTEM AND LOUDSPEAKER FOR CONVERTING AN N-BIT DIGITALIZED ELECTRIC SIGNAL INTO AN ACOUSTIC SIGNAL
Title (en)
LOUDSPEAKER SYSTEM AND LOUDSPEAKER FOR CONVERTING AN N-BIT DIGITALIZED ELECTRIC SIGNAL INTO AN ACOUSTIC SIGNAL
Publication
Application
Priority
- EP 87201485 A 19840912
- NL 8303184 A 19830915
Abstract (en)
[origin: EP0256593A2] 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.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H04R 1/005 (2013.01); H04R 9/047 (2013.01)
Citation (search report)
- [Y] US 4242541 A 19801230 - ANDO OTARO [JP]
- [A] US 3674946 A 19720704 - WINEY JAMES M
- [YD] PATENT ABSTRACTS OF JAPAN, vol. 7, no. 111 (E-175)[1256], 14th May 1983; & JP-A-58 031 699 (PIONEER K.K.) 24-02-1983
- [AD] PATENT ABSTRACTS OF JAPAN, vol. 7, no. 33 (E-157)[1178], 9th February 1983; & JP-A-57 185 798 (SONY K.K.) 16-11-1982
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 87201485 A 19840912