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FR643336A - Improvements to acoustic ducts - Google Patents

Improvements to acoustic ducts

Info

Publication number
FR643336A
FR643336A FR643336DA FR643336A FR 643336 A FR643336 A FR 643336A FR 643336D A FR643336D A FR 643336DA FR 643336 A FR643336 A FR 643336A
Authority
FR
France
Prior art keywords
acoustic ducts
ducts
acoustic
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
Louis Bechereau
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 FR643336A publication Critical patent/FR643336A/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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
    • E03D1/02—High-level flushing systems
    • E03D1/16—Cisterns for periodical discharge

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
FR643336D 1927-11-04 1927-11-04 Improvements to acoustic ducts Expired FR643336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR643336T 1927-11-04

Publications (1)

Publication Number Publication Date
FR643336A true FR643336A (en) 1928-09-14

Family

ID=8999348

Family Applications (1)

Application Number Title Priority Date Filing Date
FR643336D Expired FR643336A (en) 1927-11-04 1927-11-04 Improvements to acoustic ducts

Country Status (1)

Country Link
FR (1) FR643336A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949163A (en) * 1957-05-06 1960-08-16 Soundolier Inc Loudspeaker baffle assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949163A (en) * 1957-05-06 1960-08-16 Soundolier Inc Loudspeaker baffle assembly

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