FR978341A - Improvements to speakers, telephones, microphones or similar mechanisms for transmitting and receiving moving coil sounds - Google Patents
Improvements to speakers, telephones, microphones or similar mechanisms for transmitting and receiving moving coil soundsInfo
- Publication number
- FR978341A FR978341A FR978341DA FR978341A FR 978341 A FR978341 A FR 978341A FR 978341D A FR978341D A FR 978341DA FR 978341 A FR978341 A FR 978341A
- Authority
- FR
- France
- Prior art keywords
- microphones
- telephones
- speakers
- transmitting
- moving coil
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—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 |
---|---|---|---|
FR978341T | 1948-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR978341A true FR978341A (en) | 1951-04-12 |
Family
ID=9520414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR978341D Expired FR978341A (en) | 1948-12-30 | 1948-12-30 | Improvements to speakers, telephones, microphones or similar mechanisms for transmitting and receiving moving coil sounds |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR978341A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2998496A (en) * | 1958-04-29 | 1961-08-29 | Joseph A Hassan | Loudspeaker construction |
-
1948
- 1948-12-30 FR FR978341D patent/FR978341A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2998496A (en) * | 1958-04-29 | 1961-08-29 | Joseph A Hassan | Loudspeaker construction |
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