FR499309A - Improvements in methods and apparatus for eliminating parasitic vibrations - Google Patents

Improvements in methods and apparatus for eliminating parasitic vibrations

Info

Publication number
FR499309A
FR499309A FR499309DA FR499309A FR 499309 A FR499309 A FR 499309A FR 499309D A FR499309D A FR 499309DA FR 499309 A FR499309 A FR 499309A
Authority
FR
France
Prior art keywords
methods
parasitic vibrations
eliminating parasitic
eliminating
vibrations
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.)
Submarine Signal Co
Original Assignee
Submarine Signal Co
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 Submarine Signal Co filed Critical Submarine Signal Co
Application granted granted Critical
Publication of FR499309A publication Critical patent/FR499309A/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 
FR499309D 1917-06-08 1917-12-17 Improvements in methods and apparatus for eliminating parasitic vibrations Expired FR499309A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499309XA 1917-06-08 1917-06-08

Publications (1)

Publication Number Publication Date
FR499309A true FR499309A (en) 1920-02-07

Family

ID=1534375

Family Applications (1)

Application Number Title Priority Date Filing Date
FR499309D Expired FR499309A (en) 1917-06-08 1917-12-17 Improvements in methods and apparatus for eliminating parasitic vibrations

Country Status (1)

Country Link
FR (1) FR499309A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746266C (en) * 1930-03-10 1944-06-15 Columbia Graphophone Co Ltd Circuit arrangement for combating resonance disturbances in electro-dynamic sound recorders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746266C (en) * 1930-03-10 1944-06-15 Columbia Graphophone Co Ltd Circuit arrangement for combating resonance disturbances in electro-dynamic sound recorders

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