FR837325A - Advanced microphone - Google Patents
Advanced microphoneInfo
- Publication number
- FR837325A FR837325A FR837325DA FR837325A FR 837325 A FR837325 A FR 837325A FR 837325D A FR837325D A FR 837325DA FR 837325 A FR837325 A FR 837325A
- Authority
- FR
- France
- Prior art keywords
- microphone
- advanced
- advanced 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
- H04R21/021—Microphones with granular resistance 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 |
---|---|---|---|
FR837325T | 1937-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR837325A true FR837325A (en) | 1939-02-08 |
Family
ID=9298548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR837325D Expired FR837325A (en) | 1937-10-25 | 1937-10-25 | Advanced microphone |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR837325A (en) |
-
1937
- 1937-10-25 FR FR837325D patent/FR837325A/en not_active Expired
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