FR684701A - Perfectionnement aux casques d'écoute - Google Patents

Perfectionnement aux casques d'écoute

Info

Publication number
FR684701A
FR684701A FR684701DA FR684701A FR 684701 A FR684701 A FR 684701A FR 684701D A FR684701D A FR 684701DA FR 684701 A FR684701 A FR 684701A
Authority
FR
France
Prior art keywords
headsets
development
headsets development
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
Andre-Jules Marcelin
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.)
Anciens Etablissements Barbier Benard and Turenne SA
Original Assignee
Anciens Etablissements Barbier Benard and Turenne 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 Anciens Etablissements Barbier Benard and Turenne SA filed Critical Anciens Etablissements Barbier Benard and Turenne SA
Application granted granted Critical
Publication of FR684701A publication Critical patent/FR684701A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • H04R5/0335—Earpiece support, e.g. headbands or neckrests

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR684701D 1929-11-09 1929-11-09 Perfectionnement aux casques d'écoute Expired FR684701A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR684701T 1929-11-09

Publications (1)

Publication Number Publication Date
FR684701A true FR684701A (fr) 1930-06-30

Family

ID=9024580

Family Applications (1)

Application Number Title Priority Date Filing Date
FR684701D Expired FR684701A (fr) 1929-11-09 1929-11-09 Perfectionnement aux casques d'écoute

Country Status (1)

Country Link
FR (1) FR684701A (fr)

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