FR681263A - Improvements to sound amplifying devices - Google Patents

Improvements to sound amplifying devices

Info

Publication number
FR681263A
FR681263A FR681263DA FR681263A FR 681263 A FR681263 A FR 681263A FR 681263D A FR681263D A FR 681263DA FR 681263 A FR681263 A FR 681263A
Authority
FR
France
Prior art keywords
sound amplifying
amplifying devices
devices
sound
amplifying
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
Robert Fuller Tack
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 FR681263A publication Critical patent/FR681263A/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)
FR681263D 1929-09-03 1929-09-03 Improvements to sound amplifying devices Expired FR681263A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR681263T 1929-09-03

Publications (1)

Publication Number Publication Date
FR681263A true FR681263A (en) 1930-05-13

Family

ID=9022726

Family Applications (1)

Application Number Title Priority Date Filing Date
FR681263D Expired FR681263A (en) 1929-09-03 1929-09-03 Improvements to sound amplifying devices

Country Status (1)

Country Link
FR (1) FR681263A (en)

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