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FR709205A - Improvements to speakers and analog devices - Google Patents

Improvements to speakers and analog devices

Info

Publication number
FR709205A
FR709205A FR709205DA FR709205A FR 709205 A FR709205 A FR 709205A FR 709205D A FR709205D A FR 709205DA FR 709205 A FR709205 A FR 709205A
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)
Inventor
Joseph Bethenod
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 FR709205A publication Critical patent/FR709205A/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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR709205D 1930-04-12 1930-04-12 Improvements to speakers and analog devices Expired FR709205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR709205T 1930-04-12

Publications (1)

Publication Number Publication Date
FR709205A true FR709205A (en) 1931-08-04

Family

ID=9069328

Family Applications (1)

Application Number Title Priority Date Filing Date
FR709205D Expired FR709205A (en) 1930-04-12 1930-04-12 Improvements to speakers and analog devices

Country Status (1)

Country Link
FR (1) FR709205A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489862A (en) * 1943-01-07 1949-11-29 Gen Electric Damping for dynamic loudspeakers
US2774438A (en) * 1951-04-25 1956-12-18 Shure Bros Mechanical damping means for the diaphragms of microphones, speakers, and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489862A (en) * 1943-01-07 1949-11-29 Gen Electric Damping for dynamic loudspeakers
US2774438A (en) * 1951-04-25 1956-12-18 Shure Bros Mechanical damping means for the diaphragms of microphones, speakers, and the like

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