DE171995C - - Google Patents
Info
- Publication number
- DE171995C DE171995C DENDAT171995D DE171995DA DE171995C DE 171995 C DE171995 C DE 171995C DE NDAT171995 D DENDAT171995 D DE NDAT171995D DE 171995D A DE171995D A DE 171995DA DE 171995 C DE171995 C DE 171995C
- Authority
- DE
- Germany
- Prior art keywords
- diaphragms
- main
- membranes
- microphone
- resistance
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 13
- 239000003610 charcoal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 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
- H04R21/023—Microphones with more than one granular chamber
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE171995T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE171995C true DE171995C (OSRAM) |
Family
ID=5689728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT171995D Active DE171995C (OSRAM) |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE171995C (OSRAM) |
| FR (1) | FR351898A (OSRAM) |
-
0
- DE DENDAT171995D patent/DE171995C/de active Active
-
1905
- 1905-02-28 FR FR351898A patent/FR351898A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR351898A (fr) | 1905-07-28 |
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