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Application filed by IndividualfiledCriticalIndividual
Priority to FR7417168ApriorityCriticalpatent/FR2271732A1/fr
Publication of FR2271732A1publicationCriticalpatent/FR2271732A1/fr
Application grantedgrantedCritical
Publication of FR2271732B1publicationCriticalpatent/FR2271732B1/fr
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
H04R9/02—Details
H04R9/025—Magnetic circuit
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Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Signal Processing
(AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
FR7417168A1974-05-141974-05-14Tripolar moving coil in loudspeaker assembly - has coil in annular space between permanent magnet and ferromagnetic ring
GrantedFR2271732A1
(en)