FR715389A - Improvements to speakers and analog devices - Google Patents

Improvements to speakers and analog devices

Info

Publication number
FR715389A
FR715389A FR715389DA FR715389A FR 715389 A FR715389 A FR 715389A FR 715389D A FR715389D A FR 715389DA FR 715389 A FR715389 A FR 715389A
Authority
FR
France
Prior art keywords
speakers
analog devices
analog
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR715389A publication Critical patent/FR715389A/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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR715389D 1930-08-14 1930-08-14 Improvements to speakers and analog devices Expired FR715389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR715389T 1930-08-14

Publications (1)

Publication Number Publication Date
FR715389A true FR715389A (en) 1931-12-02

Family

ID=9088909

Family Applications (1)

Application Number Title Priority Date Filing Date
FR715389D Expired FR715389A (en) 1930-08-14 1930-08-14 Improvements to speakers and analog devices

Country Status (2)

Country Link
BE (1) BE381511A (en)
FR (1) FR715389A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897291A (en) * 1955-12-12 1959-07-28 Burke Ambrose Sound reproducer
DE3002843A1 (en) * 1980-01-26 1981-07-30 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Dynamic loudspeaker with two coaxial cones - has common central iron core for both air gaps and small cup radiator behind main cone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897291A (en) * 1955-12-12 1959-07-28 Burke Ambrose Sound reproducer
DE3002843A1 (en) * 1980-01-26 1981-07-30 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Dynamic loudspeaker with two coaxial cones - has common central iron core for both air gaps and small cup radiator behind main cone

Also Published As

Publication number Publication date
BE381511A (en)

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