DE207485C - - Google Patents
Info
- Publication number
- DE207485C DE207485C DENDAT207485D DE207485DA DE207485C DE 207485 C DE207485 C DE 207485C DE NDAT207485 D DENDAT207485 D DE NDAT207485D DE 207485D A DE207485D A DE 207485DA DE 207485 C DE207485 C DE 207485C
- Authority
- DE
- Germany
- Prior art keywords
- edge
- plate
- record
- microphone
- metal
- 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
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)
- Piezo-Electric Transducers For Audible Bands (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE207485C true DE207485C (enExample) |
Family
ID=469582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT207485D Active DE207485C (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE207485C (enExample) |
-
0
- DE DENDAT207485D patent/DE207485C/de active Active
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