FR938782A - Microphone téléphonique - Google Patents

Microphone téléphonique

Info

Publication number
FR938782A
FR938782A FR938782DA FR938782A FR 938782 A FR938782 A FR 938782A FR 938782D A FR938782D A FR 938782DA FR 938782 A FR938782 A FR 938782A
Authority
FR
France
Prior art keywords
telephone microphone
microphone
telephone
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)
French (fr)
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR938782A publication Critical patent/FR938782A/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; 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)
FR938782D 1941-07-09 1946-11-16 Microphone téléphonique Expired FR938782A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US938782XA 1941-07-09 1941-07-09

Publications (1)

Publication Number Publication Date
FR938782A true FR938782A (fr) 1948-10-25

Family

ID=22241465

Family Applications (1)

Application Number Title Priority Date Filing Date
FR938782D Expired FR938782A (fr) 1941-07-09 1946-11-16 Microphone téléphonique

Country Status (2)

Country Link
FR (1) FR938782A (en, 2012)
NL (1) NL68611C (en, 2012)

Also Published As

Publication number Publication date
NL68611C (en, 2012)

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