FR921190A - Grouped speaker device - Google Patents
Grouped speaker deviceInfo
- Publication number
- FR921190A FR921190A FR921190DA FR921190A FR 921190 A FR921190 A FR 921190A FR 921190D A FR921190D A FR 921190DA FR 921190 A FR921190 A FR 921190A
- Authority
- FR
- France
- Prior art keywords
- speaker device
- grouped
- grouped speaker
- 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR921190T | 1945-11-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR921190A true FR921190A (en) | 1947-04-29 |
Family
ID=9434239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR921190D Expired FR921190A (en) | 1945-11-06 | 1945-11-06 | Grouped speaker device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR921190A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989003919A1 (en) * | 1987-10-26 | 1989-05-05 | Naeslund Jan | A device for a meeting-hall |
-
1945
- 1945-11-06 FR FR921190D patent/FR921190A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989003919A1 (en) * | 1987-10-26 | 1989-05-05 | Naeslund Jan | A device for a meeting-hall |
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