FR796340A - Electro-acoustic transmitter - Google Patents

Electro-acoustic transmitter

Info

Publication number
FR796340A
FR796340A FR796340DA FR796340A FR 796340 A FR796340 A FR 796340A FR 796340D A FR796340D A FR 796340DA FR 796340 A FR796340 A FR 796340A
Authority
FR
France
Prior art keywords
electro
acoustic transmitter
acoustic
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
Pierre Marie Etienne E Guignot
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 FR796340A publication Critical patent/FR796340A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/08—Non-electric sound-amplifying devices, e.g. non-electric megaphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR796340D 1935-01-04 1935-01-04 Electro-acoustic transmitter Expired FR796340A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR796340T 1935-01-04

Publications (1)

Publication Number Publication Date
FR796340A true FR796340A (en) 1936-04-04

Family

ID=9235090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR796340D Expired FR796340A (en) 1935-01-04 1935-01-04 Electro-acoustic transmitter

Country Status (1)

Country Link
FR (1) FR796340A (en)

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