FR644774A - Improvements to sound reproducing devices, such as loudspeakers - Google Patents

Improvements to sound reproducing devices, such as loudspeakers

Info

Publication number
FR644774A
FR644774A FR644774DA FR644774A FR 644774 A FR644774 A FR 644774A FR 644774D A FR644774D A FR 644774DA FR 644774 A FR644774 A FR 644774A
Authority
FR
France
Prior art keywords
loudspeakers
sound reproducing
reproducing devices
devices
sound
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)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR644774A publication Critical patent/FR644774A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR644774D 1926-10-01 1927-09-21 Improvements to sound reproducing devices, such as loudspeakers Expired FR644774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644774XA 1926-10-01 1926-10-01

Publications (1)

Publication Number Publication Date
FR644774A true FR644774A (en) 1928-10-13

Family

ID=22056256

Family Applications (1)

Application Number Title Priority Date Filing Date
FR644774D Expired FR644774A (en) 1926-10-01 1927-09-21 Improvements to sound reproducing devices, such as loudspeakers

Country Status (2)

Country Link
FR (1) FR644774A (en)
NL (1) NL23994C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5568795A (en) * 1978-11-20 1980-05-23 Sony Corp Speaker

Also Published As

Publication number Publication date
NL23994C (en)

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