FR488251A - Microphone - Google Patents

Microphone

Info

Publication number
FR488251A
FR488251A FR488251DA FR488251A FR 488251 A FR488251 A FR 488251A FR 488251D A FR488251D A FR 488251DA FR 488251 A FR488251 A FR 488251A
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
English (en)
Inventor
Eric Magnus Campbell Tigerstedt
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.)
ERIC MAGNUS CAMPBELL TIGERSTED
Original Assignee
ERIC MAGNUS CAMPBELL TIGERSTED
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 ERIC MAGNUS CAMPBELL TIGERSTED filed Critical ERIC MAGNUS CAMPBELL TIGERSTED
Application granted granted Critical
Publication of FR488251A publication Critical patent/FR488251A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR488251D 1916-09-26 1918-01-02 Microphone Expired FR488251A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK488251X 1916-09-26

Publications (1)

Publication Number Publication Date
FR488251A true FR488251A (fr) 1918-09-17

Family

ID=1524631

Family Applications (1)

Application Number Title Priority Date Filing Date
FR488251D Expired FR488251A (fr) 1916-09-26 1918-01-02 Microphone

Country Status (1)

Country Link
FR (1) FR488251A (fr)

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