FR768185A - Détecteur acoustique - Google Patents
Détecteur acoustiqueInfo
- Publication number
- FR768185A FR768185A FR768185DA FR768185A FR 768185 A FR768185 A FR 768185A FR 768185D A FR768185D A FR 768185DA FR 768185 A FR768185 A FR 768185A
- Authority
- FR
- France
- Prior art keywords
- acoustic detector
- acoustic
- detector
- 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
- G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR768185T | 1934-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR768185A true FR768185A (fr) | 1934-08-01 |
Family
ID=9184068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR768185D Expired FR768185A (fr) | 1934-02-06 | 1934-02-06 | Détecteur acoustique |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR768185A (fr) |
-
1934
- 1934-02-06 FR FR768185D patent/FR768185A/fr not_active Expired
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