FR417487A - Procédé et dispositif pour la production de vibrations d'une énergie, particulièrement destinés au renforcement des ondes sonores
- Google Patents
Procédé et dispositif pour la production de vibrations d'une énergie, particulièrement destinés au renforcement des ondes sonores
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of FR417487ApublicationCriticalpatent/FR417487A/fr
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
H04R1/00—Details of transducers, loudspeakers or microphones
H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means
Landscapes
Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Signal Processing
(AREA)
FR417487D1910-02-171910-02-17Procédé et dispositif pour la production de vibrations d'une énergie, particulièrement destinés au renforcement des ondes sonores
ExpiredFR417487A
(fr)
Procédé et dispositif pour recevoir et enregistrer les oscillations d'une plaque vibrante, particulièrement applicable à la réception et à l'enregistrement de signaux radiotélégraphiques ou radiotéléphoniques