DE227745C - - Google Patents
Info
- Publication number
- DE227745C DE227745C DENDAT227745D DE227745DA DE227745C DE 227745 C DE227745 C DE 227745C DE NDAT227745 D DENDAT227745 D DE NDAT227745D DE 227745D A DE227745D A DE 227745DA DE 227745 C DE227745 C DE 227745C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- sound
- horn
- sound waves
- cap
- 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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE227745C true DE227745C (cg-RX-API-DMAC7.html) |
Family
ID=488181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT227745D Active DE227745C (cg-RX-API-DMAC7.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE227745C (cg-RX-API-DMAC7.html) |
-
0
- DE DENDAT227745D patent/DE227745C/de active Active
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