FR681263A - Improvements to sound amplifying devices - Google Patents
Improvements to sound amplifying devicesInfo
- 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
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)
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) |
-
1929
- 1929-09-03 FR FR681263D patent/FR681263A/en not_active Expired
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 |