FR731938A - Microphone refinements - Google Patents

Microphone refinements

Info

Publication number
FR731938A
FR731938A FR731938DA FR731938A FR 731938 A FR731938 A FR 731938A FR 731938D A FR731938D A FR 731938DA FR 731938 A FR731938 A FR 731938A
Authority
FR
France
Prior art keywords
refinements
microphone
microphone refinements
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
French (fr)
Inventor
Edouard Belin
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 filed Critical
Application granted granted Critical
Publication of FR731938A publication Critical patent/FR731938A/en
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
    • H04R21/00—Variable-resistance transducers
    • H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR731938D 1931-04-22 1931-04-22 Microphone refinements Expired FR731938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731938T 1931-04-22

Publications (1)

Publication Number Publication Date
FR731938A true FR731938A (en) 1932-09-10

Family

ID=9120118

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731938D Expired FR731938A (en) 1931-04-22 1931-04-22 Microphone refinements

Country Status (1)

Country Link
FR (1) FR731938A (en)

Similar Documents

Publication Publication Date Title
FR732046A (en) Filter refinements
FR771454A (en) Microphone refinements
FR715100A (en) Loudspeaker enhancements
FR719430A (en) Loud speaker
FR712387A (en) Loudspeaker enhancements
FR698003A (en) Loudspeaker enhancements
FR695243A (en) Loudspeaker enhancements
FR810939A (en) Microphone refinements
FR727861A (en) Microphone refinements
FR731938A (en) Microphone refinements
FR722393A (en) Microphone refinements
FR714858A (en) Microphone refinements
FR759145A (en) Microphone refinements
FR763382A (en) Microphone refinements
FR736576A (en) Speakers
FR705658A (en) Loudspeaker enhancements
FR681444A (en) Microphone refinements
FR672533A (en) Microphone refinements
FR723723A (en) Microphone development
FR797568A (en) Microphone refinements
FR779977A (en) Microphone refinements
FR728437A (en) Loudspeaker enhancements
FR719964A (en) Loudspeaker enhancements
FR726180A (en) Improvements to acoustic diaphragms
FR659778A (en) Microphone refinements