FR793231A - écouteur à coquille - Google Patents

écouteur à coquille

Info

Publication number
FR793231A
FR793231A FR793231DA FR793231A FR 793231 A FR793231 A FR 793231A FR 793231D A FR793231D A FR 793231DA FR 793231 A FR793231 A FR 793231A
Authority
FR
France
Prior art keywords
shell earphone
earphone
shell
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
Erich Hausdorf
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 filed Critical
Application granted granted Critical
Publication of FR793231A publication Critical patent/FR793231A/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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR793231D 1935-04-09 1935-08-01 écouteur à coquille Expired FR793231A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2134084X 1935-04-09

Publications (1)

Publication Number Publication Date
FR793231A true FR793231A (fr) 1936-01-20

Family

ID=7986540

Family Applications (1)

Application Number Title Priority Date Filing Date
FR793231D Expired FR793231A (fr) 1935-04-09 1935-08-01 écouteur à coquille

Country Status (4)

Country Link
US (1) US2134084A (fr)
BE (1) BE410671A (fr)
CH (1) CH190273A (fr)
FR (1) FR793231A (fr)

Also Published As

Publication number Publication date
US2134084A (en) 1938-10-25
BE410671A (fr)
CH190273A (de) 1937-04-15

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