FR640870A - Microphone-téléphone électrostatique - Google Patents
Microphone-téléphone électrostatiqueInfo
- Publication number
- FR640870A FR640870A FR640870DA FR640870A FR 640870 A FR640870 A FR 640870A FR 640870D A FR640870D A FR 640870DA FR 640870 A FR640870 A FR 640870A
- Authority
- FR
- France
- Prior art keywords
- telephone
- electrostatic microphone
- microphone
- electrostatic
- 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
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR640870T | 1927-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR640870A true FR640870A (fr) | 1928-07-24 |
Family
ID=8997748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR640870D Expired FR640870A (fr) | 1927-02-23 | 1927-02-23 | Microphone-téléphone électrostatique |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR640870A (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995124A (en) * | 1974-09-25 | 1976-11-30 | Saad Zaghloul Mohamed Gabr | Noise cancelling microphone |
-
1927
- 1927-02-23 FR FR640870D patent/FR640870A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995124A (en) * | 1974-09-25 | 1976-11-30 | Saad Zaghloul Mohamed Gabr | Noise cancelling microphone |
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