FR642071A - Improvements to vibrating electromagnetic devices for the transmission and reproduction of sound - Google Patents

Improvements to vibrating electromagnetic devices for the transmission and reproduction of sound

Info

Publication number
FR642071A
FR642071A FR642071DA FR642071A FR 642071 A FR642071 A FR 642071A FR 642071D A FR642071D A FR 642071DA FR 642071 A FR642071 A FR 642071A
Authority
FR
France
Prior art keywords
reproduction
sound
transmission
electromagnetic devices
vibrating electromagnetic
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
Ernesto Gui
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 FR642071A publication Critical patent/FR642071A/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)
FR642071D 1927-10-07 1927-10-07 Improvements to vibrating electromagnetic devices for the transmission and reproduction of sound Expired FR642071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR642071T 1927-10-07

Publications (1)

Publication Number Publication Date
FR642071A true FR642071A (en) 1928-08-21

Family

ID=8998598

Family Applications (1)

Application Number Title Priority Date Filing Date
FR642071D Expired FR642071A (en) 1927-10-07 1927-10-07 Improvements to vibrating electromagnetic devices for the transmission and reproduction of sound

Country Status (1)

Country Link
FR (1) FR642071A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017210B (en) * 1955-04-05 1957-10-10 Heinz Kunckel Handset with a combined speaking and listening capsule in front of the mouth and a sound channel leading to the ear
DE975971C (en) * 1955-04-05 1962-12-27 Angelika Kunckel Portable telephone with local battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017210B (en) * 1955-04-05 1957-10-10 Heinz Kunckel Handset with a combined speaking and listening capsule in front of the mouth and a sound channel leading to the ear
DE975971C (en) * 1955-04-05 1962-12-27 Angelika Kunckel Portable telephone with local battery

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