FR623100A - - Google Patents

Info

Publication number
FR623100A
FR623100A FR623100DA FR623100A FR 623100 A FR623100 A FR 623100A FR 623100D A FR623100D A FR 623100DA FR 623100 A FR623100 A FR 623100A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR623100A publication Critical patent/FR623100A/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
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR623100D Expired FR623100A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
FR623100A true FR623100A (enrdf_load_stackoverflow) 1927-06-15

Family

ID=1541256

Family Applications (1)

Application Number Title Priority Date Filing Date
FR623100D Expired FR623100A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
FR (1) FR623100A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651237A (en) * 1946-08-01 1953-09-08 Balanscope Inc Balanced focus lens system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651237A (en) * 1946-08-01 1953-09-08 Balanscope Inc Balanced focus lens system

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