FR214E - An advanced system with "telephone apparatus allowing to reinforce the sound of the voice - Google Patents
An advanced system with "telephone apparatus allowing to reinforce the sound of the voiceInfo
- Publication number
- FR214E FR214E FR214A FR214DA FR214E FR 214 E FR214 E FR 214E FR 214 A FR214 A FR 214A FR 214D A FR214D A FR 214DA FR 214 E FR214 E FR 214E
- Authority
- FR
- France
- Prior art keywords
- reinforce
- voice
- sound
- telephone apparatus
- advanced system
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR315316T |
Publications (1)
Publication Number | Publication Date |
---|---|
FR214E true FR214E (en) | 1902-11-21 |
Family
ID=8889595
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR315316D Active FR315316A (en) | |||
FR214A Expired FR214E (en) | An advanced system with "telephone apparatus allowing to reinforce the sound of the voice |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR315316D Active FR315316A (en) |
Country Status (1)
Country | Link |
---|---|
FR (2) | FR214E (en) |
-
0
- FR FR315316D patent/FR315316A/fr active Active
- FR FR214A patent/FR214E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR315316A (en) |
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