DE602492C - Mikrophon mit Kohlekoernerfuellung - Google Patents
Mikrophon mit KohlekoernerfuellungInfo
- Publication number
- DE602492C DE602492C DEL80593D DEL0080593D DE602492C DE 602492 C DE602492 C DE 602492C DE L80593 D DEL80593 D DE L80593D DE L0080593 D DEL0080593 D DE L0080593D DE 602492 C DE602492 C DE 602492C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- carbon
- membrane
- electrode
- microphone according
- 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
- 239000003245 coal Substances 0.000 title description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 230000005291 magnetic effect Effects 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000000696 magnetic material Substances 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 3
- 239000011810 insulating material Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000013017 mechanical damping Methods 0.000 claims 1
- 230000005298 paramagnetic effect Effects 0.000 claims 1
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910001923 silver oxide Inorganic materials 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 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)
- Telephone Set Structure (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4472/32A GB382165A (en) | 1932-02-15 | 1932-02-15 | Improvements in and relating to microphones |
| DEL80593D DE602492C (de) | 1932-02-15 | 1932-02-26 | Mikrophon mit Kohlekoernerfuellung |
| FR732482D FR732482A (fr) | 1932-02-15 | 1932-02-29 | Perfectionnements dans les microphones |
| BE386838D BE386838A (enrdf_load_html_response) | 1932-02-15 | 1932-03-01 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4472/32A GB382165A (en) | 1932-02-15 | 1932-02-15 | Improvements in and relating to microphones |
| DEL80593D DE602492C (de) | 1932-02-15 | 1932-02-26 | Mikrophon mit Kohlekoernerfuellung |
| FR732482T | 1932-02-29 | ||
| BE386838T | 1932-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE602492C true DE602492C (de) | 1934-09-13 |
Family
ID=9777816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL80593D Expired DE602492C (de) | 1932-02-15 | 1932-02-26 | Mikrophon mit Kohlekoernerfuellung |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE386838A (enrdf_load_html_response) |
| DE (1) | DE602492C (enrdf_load_html_response) |
| FR (1) | FR732482A (enrdf_load_html_response) |
| GB (1) | GB382165A (enrdf_load_html_response) |
-
1932
- 1932-02-15 GB GB4472/32A patent/GB382165A/en not_active Expired
- 1932-02-26 DE DEL80593D patent/DE602492C/de not_active Expired
- 1932-02-29 FR FR732482D patent/FR732482A/fr not_active Expired
- 1932-03-01 BE BE386838D patent/BE386838A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR732482A (fr) | 1932-09-21 |
| GB382165A (en) | 1932-10-20 |
| BE386838A (enrdf_load_html_response) | 1932-04-30 |
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