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

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/02Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025Mechanical 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)

Similar Documents

Publication Publication Date Title
FR46410E (en) Improvements to sound translator devices
FR636818A (en) Improvements to acoustic devices
FR669581A (en) Improvements to acoustic devices
FR644982A (en) Improvements to sound reproduction systems
FR592738A (en) Improvements to sound-producing devices
FR681263A (en) Improvements to sound amplifying devices
FR685841A (en) Improvements to sound reproduction devices
FR690953A (en) Improvements to sound reproduction devices
FR699779A (en) Improvements to sound reproduction equipment with amplifying devices
FR716534A (en) Improvements to acoustic devices
FR668222A (en) Improvements to sound reproduction devices
FR599509A (en) Improvements to sound amplifiers
FR583412A (en) Improvements to sound amplifiers
FR680259A (en) Improvements to sound reproduction systems
FR644552A (en) Improvements to acoustic devices
FR652139A (en) Improvements to sound amplifiers
FR668395A (en) Improvements to sound amplifiers
FR660494A (en) Improvements to sound reproduction systems
FR716994A (en) Improvements to acoustic devices
FR683966A (en) Improvements made to sound reproduction devices
FR665237A (en) Improvements to acoustic devices
FR637859A (en) Improvements to compensating devices
FR597718A (en) Improvements to sound amplifiers
FR39370E (en) Improvements to sound amplifiers
FR39129E (en) Improvements to sound amplifiers