BE338172A - - Google Patents
Info
- Publication number
- BE338172A BE338172A BE338172DA BE338172A BE 338172 A BE338172 A BE 338172A BE 338172D A BE338172D A BE 338172DA BE 338172 A BE338172 A BE 338172A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR618595T | 1925-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE338172A true BE338172A (en:Method) |
Family
ID=8983089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE338172D BE338172A (en:Method) | 1925-11-16 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE338172A (en:Method) |
| FR (1) | FR618595A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330296A (en) * | 1976-09-01 | 1978-03-22 | Seiko Instr & Electronics Ltd | Electro-acoustic transducer |
| JPS60134700A (ja) * | 1983-12-23 | 1985-07-17 | Nippon Denso Co Ltd | 発音装置 |
-
0
- BE BE338172D patent/BE338172A/xx unknown
-
1925
- 1925-11-16 FR FR618595D patent/FR618595A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR618595A (fr) | 1927-03-11 |