FR439098A - Appareil de commutation pour tubes acoustiques - Google Patents

Appareil de commutation pour tubes acoustiques

Info

Publication number
FR439098A
FR439098A FR439098DA FR439098A FR 439098 A FR439098 A FR 439098A FR 439098D A FR439098D A FR 439098DA FR 439098 A FR439098 A FR 439098A
Authority
FR
France
Prior art keywords
switching device
acoustic tubes
acoustic
tubes
switching
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
English (en)
Inventor
Richard John Wentworth
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR439098A publication Critical patent/FR439098A/fr
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)
FR439098D 1911-01-19 1912-01-18 Appareil de commutation pour tubes acoustiques Expired FR439098A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB439098X 1911-01-19

Publications (1)

Publication Number Publication Date
FR439098A true FR439098A (fr) 1912-06-05

Family

ID=1480563

Family Applications (1)

Application Number Title Priority Date Filing Date
FR439098D Expired FR439098A (fr) 1911-01-19 1912-01-18 Appareil de commutation pour tubes acoustiques

Country Status (1)

Country Link
FR (1) FR439098A (fr)

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