DE294128C - - Google Patents
Info
- Publication number
- DE294128C DE294128C DENDAT294128D DE294128DA DE294128C DE 294128 C DE294128 C DE 294128C DE NDAT294128 D DENDAT294128 D DE NDAT294128D DE 294128D A DE294128D A DE 294128DA DE 294128 C DE294128 C DE 294128C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- recording
- playback
- membrane
- telephone
- 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
- 239000012528 membrane Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 2
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
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE294128C true DE294128C (show.php) |
Family
ID=548724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT294128D Active DE294128C (show.php) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE294128C (show.php) |
-
0
- DE DENDAT294128D patent/DE294128C/de active Active
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