FR677266A - Improvements to sound emitting or reproducing devices - Google Patents

Improvements to sound emitting or reproducing devices

Info

Publication number
FR677266A
FR677266A FR677266DA FR677266A FR 677266 A FR677266 A FR 677266A FR 677266D A FR677266D A FR 677266DA FR 677266 A FR677266 A FR 677266A
Authority
FR
France
Prior art keywords
sound emitting
reproducing devices
reproducing
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)
Inventor
Sidney George Brown
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 FR677266A publication Critical patent/FR677266A/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
    • H04R11/02—Loudspeakers
    • 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)
  • Electromagnets (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR677266D 1929-10-28 1929-06-24 Improvements to sound emitting or reproducing devices Expired FR677266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3275429A GB337191A (en) 1929-10-28 1929-10-28 Improvements in or relating to sound reproducing or transmitting instruments

Publications (1)

Publication Number Publication Date
FR677266A true FR677266A (en) 1930-03-06

Family

ID=10343507

Family Applications (1)

Application Number Title Priority Date Filing Date
FR677266D Expired FR677266A (en) 1929-10-28 1929-06-24 Improvements to sound emitting or reproducing devices

Country Status (2)

Country Link
FR (1) FR677266A (en)
GB (2) GB320081A (en)

Also Published As

Publication number Publication date
GB337191A (en) 1930-10-30
GB320081A (en) 1929-09-30

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