FR687655A - Improvements to telephone loudspeakers - Google Patents

Improvements to telephone loudspeakers

Info

Publication number
FR687655A
FR687655A FR687655DA FR687655A FR 687655 A FR687655 A FR 687655A FR 687655D A FR687655D A FR 687655DA FR 687655 A FR687655 A FR 687655A
Authority
FR
France
Prior art keywords
loudspeakers
telephone
telephone loudspeakers
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.)
LISSEN Ltd
Original Assignee
LISSEN Ltd
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 LISSEN Ltd filed Critical LISSEN Ltd
Application granted granted Critical
Publication of FR687655A publication Critical patent/FR687655A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR687655D 1929-12-24 1930-01-03 Improvements to telephone loudspeakers Expired FR687655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB687655X 1929-12-24

Publications (1)

Publication Number Publication Date
FR687655A true FR687655A (en) 1930-08-12

Family

ID=10492928

Family Applications (1)

Application Number Title Priority Date Filing Date
FR687655D Expired FR687655A (en) 1929-12-24 1930-01-03 Improvements to telephone loudspeakers

Country Status (1)

Country Link
FR (1) FR687655A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323469A (en) * 1991-07-31 1994-06-21 Nokia (Deutschland) Gmbh Conical loudspeaker having a conical stabilizing element joined between an underside of a speaker membrane and an outside surface of a speaker moving coil carrier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323469A (en) * 1991-07-31 1994-06-21 Nokia (Deutschland) Gmbh Conical loudspeaker having a conical stabilizing element joined between an underside of a speaker membrane and an outside surface of a speaker moving coil carrier

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