FR645060A - Improvements in speaker installations for t. s. f. - Google Patents

Improvements in speaker installations for t. s. f.

Info

Publication number
FR645060A
FR645060A FR645060DA FR645060A FR 645060 A FR645060 A FR 645060A FR 645060D A FR645060D A FR 645060DA FR 645060 A FR645060 A FR 645060A
Authority
FR
France
Prior art keywords
speaker installations
installations
speaker
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
Raymond Ferry
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 FR645060A publication Critical patent/FR645060A/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
    • G10K11/02—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)
FR645060D 1927-12-02 1927-12-02 Improvements in speaker installations for t. s. f. Expired FR645060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR645060T 1927-12-02

Publications (1)

Publication Number Publication Date
FR645060A true FR645060A (en) 1928-10-19

Family

ID=9000508

Family Applications (1)

Application Number Title Priority Date Filing Date
FR645060D Expired FR645060A (en) 1927-12-02 1927-12-02 Improvements in speaker installations for t. s. f.

Country Status (1)

Country Link
FR (1) FR645060A (en)

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