DE228135C - - Google Patents
Info
- Publication number
- DE228135C DE228135C DENDAT228135D DE228135DA DE228135C DE 228135 C DE228135 C DE 228135C DE NDAT228135 D DENDAT228135 D DE NDAT228135D DE 228135D A DE228135D A DE 228135DA DE 228135 C DE228135 C DE 228135C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- cooling
- electrode
- tube
- microphones
- 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
- 238000001816 cooling Methods 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 239000003245 coal Substances 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 3
- 208000031872 Body Remains Diseases 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 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)
- Details Of Audible-Bandwidth Transducers (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE249729T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE228135C true DE228135C (cg-RX-API-DMAC7.html) |
Family
ID=5935810
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT228135D Active DE228135C (cg-RX-API-DMAC7.html) | |||
| DENDAT228627D Active DE228627C (cg-RX-API-DMAC7.html) | |||
| DENDAT249729D Active DE249729C (cg-RX-API-DMAC7.html) |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT228627D Active DE228627C (cg-RX-API-DMAC7.html) | |||
| DENDAT249729D Active DE249729C (cg-RX-API-DMAC7.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (3) | DE249729C (cg-RX-API-DMAC7.html) |
-
0
- DE DENDAT228135D patent/DE228135C/de active Active
- DE DENDAT228627D patent/DE228627C/de active Active
- DE DENDAT249729D patent/DE249729C/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE228627C (cg-RX-API-DMAC7.html) | |
| DE249729C (cg-RX-API-DMAC7.html) |
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