FR988891A - Microphone à perle-amplificateur - Google Patents

Microphone à perle-amplificateur

Info

Publication number
FR988891A
FR988891A FR988891DA FR988891A FR 988891 A FR988891 A FR 988891A FR 988891D A FR988891D A FR 988891DA FR 988891 A FR988891 A FR 988891A
Authority
FR
France
Prior art keywords
amplifier microphone
bead amplifier
bead
microphone
amplifier
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)
Inventor
Edmond Arrin
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 FR988891A publication Critical patent/FR988891A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR988891D 1944-01-19 1944-01-19 Microphone à perle-amplificateur Expired FR988891A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR988891T 1944-01-19

Publications (1)

Publication Number Publication Date
FR988891A true FR988891A (fr) 1951-09-03

Family

ID=9539817

Family Applications (3)

Application Number Title Priority Date Filing Date
FR988891D Expired FR988891A (fr) 1944-01-19 1944-01-19 Microphone à perle-amplificateur
FR56275D Expired FR56275E (fr) 1944-01-19 1944-05-22 Microphone à perle-amplificateur
FR56315D Expired FR56315E (fr) 1944-01-19 1944-11-20 Microphone à perle-amplificateur

Family Applications After (2)

Application Number Title Priority Date Filing Date
FR56275D Expired FR56275E (fr) 1944-01-19 1944-05-22 Microphone à perle-amplificateur
FR56315D Expired FR56315E (fr) 1944-01-19 1944-11-20 Microphone à perle-amplificateur

Country Status (1)

Country Link
FR (3) FR988891A (fr)

Also Published As

Publication number Publication date
FR56315E (fr) 1952-09-22
FR56275E (fr) 1952-09-22

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