FR439837A - Apparatus for acoustic pipes - Google Patents

Apparatus for acoustic pipes

Info

Publication number
FR439837A
FR439837A FR439837DA FR439837A FR 439837 A FR439837 A FR 439837A FR 439837D A FR439837D A FR 439837DA FR 439837 A FR439837 A FR 439837A
Authority
FR
France
Prior art keywords
acoustic pipes
acoustic
pipes
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 Dumas
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 DUMAS
Original Assignee
LUCIEN DUMAS
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 DUMAS filed Critical LUCIEN DUMAS
Application granted granted Critical
Publication of FR439837A publication Critical patent/FR439837A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR439837D 1912-02-07 1912-02-07 Apparatus for acoustic pipes Expired FR439837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR439837T 1912-02-07

Publications (1)

Publication Number Publication Date
FR439837A true FR439837A (en) 1912-06-24

Family

ID=1481235

Family Applications (1)

Application Number Title Priority Date Filing Date
FR439837D Expired FR439837A (en) 1912-02-07 1912-02-07 Apparatus for acoustic pipes

Country Status (1)

Country Link
FR (1) FR439837A (en)

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