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FR557702A - Human-speaking sound boxes - Google Patents

Human-speaking sound boxes

Info

Publication number
FR557702A
FR557702A FR557702DA FR557702A FR 557702 A FR557702 A FR 557702A FR 557702D A FR557702D A FR 557702DA FR 557702 A FR557702 A FR 557702A
Authority
FR
France
Prior art keywords
human
sound boxes
speaking sound
speaking
boxes
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
Octave Peyret
Raymond Peyret
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 FR557702A publication Critical patent/FR557702A/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
    • G10K11/08—Non-electric sound-amplifying devices, e.g. non-electric megaphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR557702D 1922-10-23 1922-10-23 Human-speaking sound boxes Expired FR557702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR557702T 1922-10-23

Publications (1)

Publication Number Publication Date
FR557702A true FR557702A (en) 1923-08-14

Family

ID=8941055

Family Applications (1)

Application Number Title Priority Date Filing Date
FR557702D Expired FR557702A (en) 1922-10-23 1922-10-23 Human-speaking sound boxes

Country Status (1)

Country Link
FR (1) FR557702A (en)

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