FR867849A - Dispositifs acoustiques - Google Patents
Dispositifs acoustiquesInfo
- Publication number
- FR867849A FR867849A FR867849DA FR867849A FR 867849 A FR867849 A FR 867849A FR 867849D A FR867849D A FR 867849DA FR 867849 A FR867849 A FR 867849A
- Authority
- FR
- France
- Prior art keywords
- acoustic devices
- acoustic
- devices
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
Landscapes
- Health & Medical Sciences (AREA)
- General 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 |
---|---|---|---|
US867849XA | 1939-11-24 | 1939-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR867849A true FR867849A (fr) | 1941-11-29 |
Family
ID=22200891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR867849D Expired FR867849A (fr) | 1939-11-24 | 1940-11-29 | Dispositifs acoustiques |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR867849A (fr) |
-
1940
- 1940-11-29 FR FR867849D patent/FR867849A/fr not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR867448A (fr) | Dispositifs pyroélectriques | |
FR822144A (fr) | Dispositifs acoustiques | |
FR865593A (fr) | Transducteurs électro acoustiques | |
FR844299A (fr) | Dispositifs acoustiques | |
FR824971A (fr) | Dispositifs acoustiques | |
FR867849A (fr) | Dispositifs acoustiques | |
FR867832A (fr) | Dispositifs piézoélectriques | |
FR871296A (fr) | Laryngophone piézo-électrique | |
FR857932A (fr) | Triporteur | |
FI19877A (fi) | Avkylnings- och uppvärmningsapparat | |
FI20284A (fi) | Centrifugalbroms | |
FR849029A (fr) | Vibrateur | |
FR953251A (fr) | Appareils électro-acoustiques | |
FR863831A (fr) | Sélecteur acoustique | |
FI20489A (fi) | Gnistsläckareanordning | |
FI19621A (fi) | Lyftanordning | |
FI20217A (fi) | Avstämbart bandfilter | |
FI20128A (fi) | Lättmetallklack | |
FI20112A (fi) | Tröskverk | |
FI20022A (fi) | Paarit | |
FI20011A (fi) | Flimmerpejlingsmottagare | |
FI19936A (fi) | Flimmerpejlingsmottagare | |
FI19925A (fi) | Skidbindning | |
FI19903A (fi) | Salaojalapio | |
FI20305A (fi) | Push-pull-förstärkare |