FR834047A - Casque téléphonique - Google Patents

Casque téléphonique

Info

Publication number
FR834047A
FR834047A FR834047DA FR834047A FR 834047 A FR834047 A FR 834047A FR 834047D A FR834047D A FR 834047DA FR 834047 A FR834047 A FR 834047A
Authority
FR
France
Prior art keywords
telephone headset
headset
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)
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Application granted granted Critical
Publication of FR834047A publication Critical patent/FR834047A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR834047D 1937-02-26 1938-02-21 Casque téléphonique Expired FR834047A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE834047X 1937-02-26

Publications (1)

Publication Number Publication Date
FR834047A true FR834047A (fr) 1938-11-09

Family

ID=6760559

Family Applications (1)

Application Number Title Priority Date Filing Date
FR834047D Expired FR834047A (fr) 1937-02-26 1938-02-21 Casque téléphonique

Country Status (1)

Country Link
FR (1) FR834047A (fr)

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