FR668273A - Improvement in electro-acoustic devices - Google Patents

Improvement in electro-acoustic devices

Info

Publication number
FR668273A
FR668273A FR668273DA FR668273A FR 668273 A FR668273 A FR 668273A FR 668273D A FR668273D A FR 668273DA FR 668273 A FR668273 A FR 668273A
Authority
FR
France
Prior art keywords
electro
improvement
acoustic devices
acoustic
devices
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.)
ATELIERS DE MONTAGE ET D EBENI
Original Assignee
ATELIERS DE MONTAGE ET D EBENI
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 ATELIERS DE MONTAGE ET D EBENI filed Critical ATELIERS DE MONTAGE ET D EBENI
Application granted granted Critical
Publication of FR668273A publication Critical patent/FR668273A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
FR668273D 1928-04-28 1928-04-28 Improvement in electro-acoustic devices Expired FR668273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR668273T 1928-04-28

Publications (1)

Publication Number Publication Date
FR668273A true FR668273A (en) 1929-10-30

Family

ID=9014915

Family Applications (1)

Application Number Title Priority Date Filing Date
FR668273D Expired FR668273A (en) 1928-04-28 1928-04-28 Improvement in electro-acoustic devices

Country Status (3)

Country Link
BE (1) BE358300A (en)
FR (1) FR668273A (en)
GB (1) GB310490A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929078A (en) * 1995-08-09 1999-07-27 Synthelabo 1- 2-(2,3-Dihydro-1H-inden-1-yl)ethyl!-4-(naphthalen-1-yl) piperazine, derivatives, preparation thereof and therapeutical use thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2298758B (en) * 1995-03-09 1999-05-26 Prima Dev Ltd Loudspeaker systems and enclosures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929078A (en) * 1995-08-09 1999-07-27 Synthelabo 1- 2-(2,3-Dihydro-1H-inden-1-yl)ethyl!-4-(naphthalen-1-yl) piperazine, derivatives, preparation thereof and therapeutical use thereof

Also Published As

Publication number Publication date
BE358300A (en)
GB310490A (en) 1929-07-04

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