FR837325A - Microphone perfectionné - Google Patents

Microphone perfectionné

Info

Publication number
FR837325A
FR837325A FR837325DA FR837325A FR 837325 A FR837325 A FR 837325A FR 837325D A FR837325D A FR 837325DA FR 837325 A FR837325 A FR 837325A
Authority
FR
France
Prior art keywords
microphone
advanced
advanced 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)
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.)
ALE International SAS
Original Assignee
La Telephone Industrielle et Commerciale Telic Alcatel SA
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 La Telephone Industrielle et Commerciale Telic Alcatel SA filed Critical La Telephone Industrielle et Commerciale Telic Alcatel SA
Application granted granted Critical
Publication of FR837325A publication Critical patent/FR837325A/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)
FR837325D 1937-10-25 1937-10-25 Microphone perfectionné Expired FR837325A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR837325T 1937-10-25

Publications (1)

Publication Number Publication Date
FR837325A true FR837325A (fr) 1939-02-08

Family

ID=9298548

Family Applications (1)

Application Number Title Priority Date Filing Date
FR837325D Expired FR837325A (fr) 1937-10-25 1937-10-25 Microphone perfectionné

Country Status (1)

Country Link
FR (1) FR837325A (fr)

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