FR683270A - Mute device for phonographs, gramophones and similar devices - Google Patents

Mute device for phonographs, gramophones and similar devices

Info

Publication number
FR683270A
FR683270A FR683270DA FR683270A FR 683270 A FR683270 A FR 683270A FR 683270D A FR683270D A FR 683270DA FR 683270 A FR683270 A FR 683270A
Authority
FR
France
Prior art keywords
gramophones
phonographs
similar devices
mute device
mute
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
Gyula Zilzer
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 FR683270A publication Critical patent/FR683270A/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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR683270D 1929-10-14 1929-10-14 Mute device for phonographs, gramophones and similar devices Expired FR683270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR683270T 1929-10-14

Publications (1)

Publication Number Publication Date
FR683270A true FR683270A (en) 1930-06-10

Family

ID=9023804

Family Applications (1)

Application Number Title Priority Date Filing Date
FR683270D Expired FR683270A (en) 1929-10-14 1929-10-14 Mute device for phonographs, gramophones and similar devices

Country Status (1)

Country Link
FR (1) FR683270A (en)

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