FR519035A - Microphone - Google Patents
MicrophoneInfo
- Publication number
- FR519035A FR519035A FR519035A FR519035DA FR519035A FR 519035 A FR519035 A FR 519035A FR 519035 A FR519035 A FR 519035A FR 519035D A FR519035D A FR 519035DA FR 519035 A FR519035 A FR 519035A
- Authority
- FR
- France
- Prior art keywords
- microphone
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK519035X | 1918-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR519035A true FR519035A (en) | 1921-06-03 |
Family
ID=8151257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR519035A Expired FR519035A (en) | 1918-11-08 | 1920-07-05 | Microphone |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR519035A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE863083C (en) * | 1941-09-12 | 1953-01-15 | Siemens Ag | Carbon microphone |
DE757629C (en) * | 1938-09-09 | 1953-01-19 | Lorenz C Ag | Cross-flow microphone |
-
1920
- 1920-07-05 FR FR519035A patent/FR519035A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE757629C (en) * | 1938-09-09 | 1953-01-19 | Lorenz C Ag | Cross-flow microphone |
DE863083C (en) * | 1941-09-12 | 1953-01-15 | Siemens Ag | Carbon microphone |
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