FR574642A - Microphone perfectionné - Google Patents

Microphone perfectionné

Info

Publication number
FR574642A
FR574642A FR574642DA FR574642A FR 574642 A FR574642 A FR 574642A FR 574642D A FR574642D A FR 574642DA FR 574642 A FR574642 A FR 574642A
Authority
FR
France
Prior art keywords
microphone
advanced
advanced microphone
Prior art date
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.)
Expired
Application number
Other languages
English (en)
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR574642A publication Critical patent/FR574642A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
FR574642D 1924-01-30 1923-03-05 Microphone perfectionné Expired FR574642A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR29279T 1924-01-30

Publications (1)

Publication Number Publication Date
FR574642A true FR574642A (fr) 1924-07-16

Family

ID=8667320

Family Applications (2)

Application Number Title Priority Date Filing Date
FR574642D Expired FR574642A (fr) 1924-01-30 1923-03-05 Microphone perfectionné
FR29279D Expired FR29279E (fr) 1924-01-30 1924-01-30 Microphone perfectionné

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR29279D Expired FR29279E (fr) 1924-01-30 1924-01-30 Microphone perfectionné

Country Status (1)

Country Link
FR (2) FR574642A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922849A (en) * 1955-12-19 1960-01-26 Fukuin Denki Kabushiki Kaisha Compound electric speaker
US4276452A (en) * 1978-08-15 1981-06-30 Sony Corporation Membrane type electro-acoustic transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922849A (en) * 1955-12-19 1960-01-26 Fukuin Denki Kabushiki Kaisha Compound electric speaker
US4276452A (en) * 1978-08-15 1981-06-30 Sony Corporation Membrane type electro-acoustic transducer

Also Published As

Publication number Publication date
FR29279E (fr) 1925-07-10

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