FR571545A - Haut-parleur - Google Patents
Haut-parleurInfo
- Publication number
- FR571545A FR571545A FR571545DA FR571545A FR 571545 A FR571545 A FR 571545A FR 571545D A FR571545D A FR 571545DA FR 571545 A FR571545 A FR 571545A
- Authority
- FR
- France
- Prior art keywords
- loud speaker
- loud
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR571545T | 1923-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR571545A true FR571545A (fr) | 1924-05-19 |
Family
ID=8950628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR571545D Expired FR571545A (fr) | 1923-07-19 | 1923-07-19 | Haut-parleur |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR571545A (fr) |
-
1923
- 1923-07-19 FR FR571545D patent/FR571545A/fr not_active Expired
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