FR683779A - Improvements to electrical devices reproducing sound - Google Patents

Improvements to electrical devices reproducing sound

Info

Publication number
FR683779A
FR683779A FR683779DA FR683779A FR 683779 A FR683779 A FR 683779A FR 683779D A FR683779D A FR 683779DA FR 683779 A FR683779 A FR 683779A
Authority
FR
France
Prior art keywords
electrical devices
reproducing sound
devices reproducing
sound
electrical
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
French (fr)
Inventor
Waldemar Lazare Colassi
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 FR683779A publication Critical patent/FR683779A/en
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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR683779D 1929-10-23 1929-10-23 Improvements to electrical devices reproducing sound Expired FR683779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR683779T 1929-10-23

Publications (1)

Publication Number Publication Date
FR683779A true FR683779A (en) 1930-06-17

Family

ID=9024077

Family Applications (1)

Application Number Title Priority Date Filing Date
FR683779D Expired FR683779A (en) 1929-10-23 1929-10-23 Improvements to electrical devices reproducing sound

Country Status (3)

Country Link
BE (1) BE364802A (en)
CH (1) CH147847A (en)
FR (1) FR683779A (en)

Also Published As

Publication number Publication date
BE364802A (en)
CH147847A (en) 1931-06-30

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