FR425338A - Microphone - Google Patents
MicrophoneInfo
- Publication number
- FR425338A FR425338A FR425338A FR425338DA FR425338A FR 425338 A FR425338 A FR 425338A FR 425338 A FR425338 A FR 425338A FR 425338D A FR425338D A FR 425338DA FR 425338 A FR425338 A FR 425338A
- Authority
- FR
- France
- Prior art keywords
- microphone
- 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.)
- Expired
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)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191003179T | 1910-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR425338A true FR425338A (fr) | 1911-06-08 |
Family
ID=32560560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR425338A Expired FR425338A (fr) | 1910-02-09 | 1911-01-28 | Microphone |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE243505C (fr) |
FR (1) | FR425338A (fr) |
GB (1) | GB191003179A (fr) |
-
0
- DE DENDAT243505D patent/DE243505C/de active Active
-
1910
- 1910-02-09 GB GB191003179D patent/GB191003179A/en not_active Expired
-
1911
- 1911-01-28 FR FR425338A patent/FR425338A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE243505C (fr) | |
GB191003179A (en) | 1910-11-03 |
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