FR385844A - Microphone - Google Patents
MicrophoneInfo
- Publication number
- FR385844A FR385844A FR385844DA FR385844A FR 385844 A FR385844 A FR 385844A FR 385844D A FR385844D A FR 385844DA FR 385844 A FR385844 A FR 385844A
- 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
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 |
---|---|---|---|
FR385844T | 1907-12-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR385844A true FR385844A (fr) | 1908-05-26 |
Family
ID=1431695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR385844D Expired FR385844A (fr) | 1907-12-31 | 1907-12-31 | Microphone |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR385844A (fr) |
-
1907
- 1907-12-31 FR FR385844D patent/FR385844A/fr not_active Expired
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