GB557266A - Improvements in and relating to acoustic systems and apparatus - Google Patents
Improvements in and relating to acoustic systems and apparatusInfo
- Publication number
- GB557266A GB557266A GB629842A GB629842A GB557266A GB 557266 A GB557266 A GB 557266A GB 629842 A GB629842 A GB 629842A GB 629842 A GB629842 A GB 629842A GB 557266 A GB557266 A GB 557266A
- Authority
- GB
- United Kingdom
- Prior art keywords
- class
- relating
- diaphragm
- acoustic systems
- recording
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
557,266. Oscillographs. ALLAN, W. H. May 9, 1942, No. 6298. [Class 37] [Also in Group XXXIX] For recording sound, a diaphragm 2, 4 vibrated directly by the sound waves or indirectly through the electromagnetic means, carries a mirror 15 which reflects and focuses light from a source 16 on to a recording film 17. The diaphragm consists of a rigid control portion 4 with a flexible surround 2, preferably of rubber, and forms part of the outer wall of a sealed gas-tight enclosure 1 in which the pressure is sub-atmospheric. Specification 131,041, [Class 40 (iv)], is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB629842A GB557266A (en) | 1942-05-09 | 1942-05-09 | Improvements in and relating to acoustic systems and apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB629842A GB557266A (en) | 1942-05-09 | 1942-05-09 | Improvements in and relating to acoustic systems and apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB557266A true GB557266A (en) | 1943-11-12 |
Family
ID=9811950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB629842A Expired GB557266A (en) | 1942-05-09 | 1942-05-09 | Improvements in and relating to acoustic systems and apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB557266A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999029139A2 (en) * | 1997-12-03 | 1999-06-10 | Sennheiser Electronic Gmbh & Co. Kg | Optical acoustic sensor, especially a microphone, with an addtional reflection device |
-
1942
- 1942-05-09 GB GB629842A patent/GB557266A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999029139A2 (en) * | 1997-12-03 | 1999-06-10 | Sennheiser Electronic Gmbh & Co. Kg | Optical acoustic sensor, especially a microphone, with an addtional reflection device |
WO1999029139A3 (en) * | 1997-12-03 | 1999-08-05 | Sennheiser Electronic | Optical acoustic sensor, especially a microphone, with an addtional reflection device |
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