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Publication of FR621871ApublicationCriticalpatent/FR621871A/fr
G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K15/00—Acoustics not otherwise provided for
G10K15/08—Arrangements for producing a reverberation or echo sound
G10K15/10—Arrangements for producing a reverberation or echo sound using time-delay networks comprising electromechanical or electro-acoustic devices
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FR621871D1925-09-221926-09-22Procédé pour améliorer la sonorité en t. s. f.
ExpiredFR621871A
(fr)