FR386507A - Bi-microphone - Google Patents

Bi-microphone

Info

Publication number
FR386507A
FR386507A FR386507DA FR386507A FR 386507 A FR386507 A FR 386507A FR 386507D A FR386507D A FR 386507DA FR 386507 A FR386507 A FR 386507A
Authority
FR
France
Prior art keywords
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
French (fr)
Inventor
Fernand Fribourg
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.)
FERNAND FRIBOURG
Original Assignee
FERNAND FRIBOURG
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 FERNAND FRIBOURG filed Critical FERNAND FRIBOURG
Application granted granted Critical
Publication of FR386507A publication Critical patent/FR386507A/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
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR386507D 1908-01-24 1908-01-24 Bi-microphone Expired FR386507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR386507T 1908-01-24

Publications (1)

Publication Number Publication Date
FR386507A true FR386507A (en) 1908-06-16

Family

ID=1432309

Family Applications (1)

Application Number Title Priority Date Filing Date
FR386507D Expired FR386507A (en) 1908-01-24 1908-01-24 Bi-microphone

Country Status (1)

Country Link
FR (1) FR386507A (en)

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