FR570145A - Téléphone à condensateur - Google Patents
Téléphone à condensateurInfo
- Publication number
- FR570145A FR570145A FR570145DA FR570145A FR 570145 A FR570145 A FR 570145A FR 570145D A FR570145D A FR 570145DA FR 570145 A FR570145 A FR 570145A
- Authority
- FR
- France
- Prior art keywords
- condenser
- phone
- condenser phone
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202999X | 1922-08-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR570145A true FR570145A (fr) | 1924-04-24 |
Family
ID=5774279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR570145D Expired FR570145A (fr) | 1922-08-26 | 1923-08-25 | Téléphone à condensateur |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR570145A (fr) |
GB (1) | GB202999A (fr) |
-
1923
- 1923-08-25 FR FR570145D patent/FR570145A/fr not_active Expired
- 1923-08-25 GB GB21569/23A patent/GB202999A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB202999A (en) | 1924-11-20 |
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