FR443236A - Microphone - Google Patents
MicrophoneInfo
- Publication number
- FR443236A FR443236A FR443236A FR443236DA FR443236A FR 443236 A FR443236 A FR 443236A FR 443236 A FR443236 A FR 443236A FR 443236D A FR443236D A FR 443236DA FR 443236 A FR443236 A FR 443236A
- 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
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191111610T | 1911-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR443236A true FR443236A (en) | 1912-09-19 |
Family
ID=32499463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR443236A Expired FR443236A (en) | 1911-05-13 | 1912-05-02 | Microphone |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR443236A (en) |
GB (1) | GB191111610A (en) |
-
1911
- 1911-05-13 GB GB191111610D patent/GB191111610A/en not_active Expired
-
1912
- 1912-05-02 FR FR443236A patent/FR443236A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB191111610A (en) | 1911-12-14 |
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