GB651452A - Improvements in microphones - Google Patents
Improvements in microphonesInfo
- Publication number
- GB651452A GB651452A GB27126/46A GB2712646A GB651452A GB 651452 A GB651452 A GB 651452A GB 27126/46 A GB27126/46 A GB 27126/46A GB 2712646 A GB2712646 A GB 2712646A GB 651452 A GB651452 A GB 651452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- microphones
- microphone
- carbonelorraine
- sept
- soc
- 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
- 239000008187 granular material Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
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)
- Conductive Materials (AREA)
Abstract
651,452. Microphones. SOC. LE CARBONELORRAINE. Sept. 10, 1946, No. 27126. Convention date, July 20, 1942. Drawings to Specification. [Class 40 (iv)] In a carbon granule microphone the granules and /or the diaphragm are coated with a thin film of a dielectric substance, the electrical conductivity of which increases under the influence of the electric field in the microphone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR651452X | 1942-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB651452A true GB651452A (en) | 1951-04-04 |
Family
ID=9004652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27126/46A Expired GB651452A (en) | 1942-07-20 | 1946-09-10 | Improvements in microphones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB651452A (en) |
-
1946
- 1946-09-10 GB GB27126/46A patent/GB651452A/en not_active Expired
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