FR2262894A1 - - Google Patents
Info
- Publication number
- FR2262894A1 FR2262894A1 FR7506569A FR7506569A FR2262894A1 FR 2262894 A1 FR2262894 A1 FR 2262894A1 FR 7506569 A FR7506569 A FR 7506569A FR 7506569 A FR7506569 A FR 7506569A FR 2262894 A1 FR2262894 A1 FR 2262894A1
- Authority
- FR
- France
- 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.)
- Withdrawn
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
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742409830 DE2409830C3 (de) | 1974-03-01 | Einrichtung zur Schallaufnahme und -wiedergabe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2262894A1 true FR2262894A1 (enExample) | 1975-09-26 |
Family
ID=5908823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7506569A Withdrawn FR2262894A1 (enExample) | 1974-03-01 | 1975-03-03 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2262894A1 (enExample) |
| GB (1) | GB1468122A (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108184197B (zh) * | 2018-03-23 | 2023-08-22 | 苏州登堡电子科技有限公司 | 振壁传声装置 |
-
1975
- 1975-02-27 GB GB831675A patent/GB1468122A/en not_active Expired
- 1975-03-03 FR FR7506569A patent/FR2262894A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB1468122A (en) | 1977-03-23 |
| DE2409830A1 (de) | 1975-09-04 |
| DE2409830B2 (de) | 1976-10-28 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |