FR644774A - Improvements to sound reproducing devices, such as loudspeakers - Google Patents
Improvements to sound reproducing devices, such as loudspeakersInfo
- Publication number
- FR644774A FR644774A FR644774DA FR644774A FR 644774 A FR644774 A FR 644774A FR 644774D A FR644774D A FR 644774DA FR 644774 A FR644774 A FR 644774A
- Authority
- FR
- France
- Prior art keywords
- loudspeakers
- sound reproducing
- reproducing devices
- devices
- sound
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US644774XA | 1926-10-01 | 1926-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR644774A true FR644774A (en) | 1928-10-13 |
Family
ID=22056256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR644774D Expired FR644774A (en) | 1926-10-01 | 1927-09-21 | Improvements to sound reproducing devices, such as loudspeakers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR644774A (en) |
NL (1) | NL23994C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5568795A (en) * | 1978-11-20 | 1980-05-23 | Sony Corp | Speaker |
-
0
- NL NL23994D patent/NL23994C/xx active
-
1927
- 1927-09-21 FR FR644774D patent/FR644774A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL23994C (en) |
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