FR640870A - Electrostatic microphone-telephone - Google Patents

Electrostatic microphone-telephone

Info

Publication number
FR640870A
FR640870A FR640870DA FR640870A FR 640870 A FR640870 A FR 640870A FR 640870D A FR640870D A FR 640870DA FR 640870 A FR640870 A FR 640870A
Authority
FR
France
Prior art keywords
telephone
electrostatic microphone
microphone
electrostatic
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
Lucien Levy
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 FR640870A publication Critical patent/FR640870A/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
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR640870D 1927-02-23 1927-02-23 Electrostatic microphone-telephone Expired FR640870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR640870T 1927-02-23

Publications (1)

Publication Number Publication Date
FR640870A true FR640870A (en) 1928-07-24

Family

ID=8997748

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640870D Expired FR640870A (en) 1927-02-23 1927-02-23 Electrostatic microphone-telephone

Country Status (1)

Country Link
FR (1) FR640870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995124A (en) * 1974-09-25 1976-11-30 Saad Zaghloul Mohamed Gabr Noise cancelling microphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995124A (en) * 1974-09-25 1976-11-30 Saad Zaghloul Mohamed Gabr Noise cancelling microphone

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