EP 1198972 A1 20020424 - ELECTRIC SIGNAL PROCESSING FOR ELECTROACOUSTIC TRANSDUCER
Title (en)
ELECTRIC SIGNAL PROCESSING FOR ELECTROACOUSTIC TRANSDUCER
Title (de)
VERARBEITUNG EINES ELEKTRISCHEN SIGNALS FÜR ELEKTROAKUSTISCHEN WANDLER
Title (fr)
TRAITEMENT DE SIGNAL ELECTRIQUE POUR TRANSDUCTEUR ELECTROACOUSTIQUE
Publication
Application
Priority
- FR 9901808 W 19990722
- FR 9809441 A 19980721
Abstract (en)
[origin: WO0108446A1] It is usual to utilise electric current filters for electroacoustic transducers, said filters are in general frequency mixers. Audio electric signals have a pulse response quality and excellent frequency adjustment. As for electroacoustic transducers, the transformation is not properly carried out for electroacoustic transducers. The electric pulses travel at the speed of the electrons whereas the membrane and its motor have a specific weight. Said weight has a mechanical inertia preventing an instantaneous response to the electric effects. The invention concerns a method which consists in modifying at least one modulation of the original electric pulse into micro electrical phase shifts. Said micro phase shifts are generated by impedance of the components. An apparatus consists of several components of similar type mounted in parallel, thereby forming a self-powered oscillator, energized by the original electric signal. Said apparatus is mounted on the circuit powering the enclosure.
IPC 1-7
IPC 8 full level
H04R 1/00 (2006.01); H04R 3/00 (2006.01); H04R 3/04 (2006.01); H04R 3/12 (2006.01)
IPC 8 main group level
H04R (2006.01)
CPC (source: EP US)
Citation (search report)
See references of WO 0108446A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0108446 A1 20010201; AT E278309 T1 20041015; AU 4915899 A 20010213; AU 778948 B2 20041223; BR 9917413 A 20020409; CA 2379888 A1 20010201; CA 2379888 C 20091006; CN 1371588 A 20020925; DE 69920775 D1 20041104; DE 69920775 T2 20051013; DK 1198972 T3 20041227; EP 1198972 A1 20020424; EP 1198972 B1 20040929; ES 2228073 T3 20050401; FR 2781637 A1 20000128; FR 2781637 B1 20021031; IL 147735 A0 20020814; JP 2003527773 A 20030916; NO 20020315 D0 20020121; NO 20020315 L 20020121; US 7024007 B1 20060404
DOCDB simple family (application)
FR 9901808 W 19990722; AT 99932953 T 19990722; AU 4915899 A 19990722; BR 9917413 A 19990722; CA 2379888 A 19990722; CN 99816815 A 19990722; DE 69920775 T 19990722; DK 99932953 T 19990722; EP 99932953 A 19990722; ES 99932953 T 19990722; FR 9809441 A 19980721; IL 14773599 A 19990722; JP 2001513204 A 19990722; NO 20020315 A 20020121; US 3161302 A 20020520