FR441339A - Telephone transmitter - Google Patents

Telephone transmitter

Info

Publication number
FR441339A
FR441339A FR441339DA FR441339A FR 441339 A FR441339 A FR 441339A FR 441339D A FR441339D A FR 441339DA FR 441339 A FR441339 A FR 441339A
Authority
FR
France
Prior art keywords
telephone transmitter
telephone
transmitter
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
Lucien-Alexandre-Louis Struxiano
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.)
LUCIEN ALEXANDRE LOUIS STRUXIA
Original Assignee
LUCIEN ALEXANDRE LOUIS STRUXIA
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 LUCIEN ALEXANDRE LOUIS STRUXIA filed Critical LUCIEN ALEXANDRE LOUIS STRUXIA
Application granted granted Critical
Publication of FR441339A publication Critical patent/FR441339A/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)
FR441339D 1911-03-14 1912-03-14 Telephone transmitter Expired FR441339A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE441339X 1911-03-14

Publications (1)

Publication Number Publication Date
FR441339A true FR441339A (en) 1912-08-03

Family

ID=1482602

Family Applications (1)

Application Number Title Priority Date Filing Date
FR441339D Expired FR441339A (en) 1911-03-14 1912-03-14 Telephone transmitter

Country Status (1)

Country Link
FR (1) FR441339A (en)

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