GB405477A - Photographic recording of sound - Google Patents
Photographic recording of soundInfo
- Publication number
- GB405477A GB405477A GB9099/33A GB909933A GB405477A GB 405477 A GB405477 A GB 405477A GB 9099/33 A GB9099/33 A GB 9099/33A GB 909933 A GB909933 A GB 909933A GB 405477 A GB405477 A GB 405477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- recording
- amplifier
- resolution
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
405,477. Optical sound - recording. RADIO CORPORATION OF AMERICA, 570, Lexington Avenue, New York, U.S.A. March 25, 1933, No. 9099. Convention date, May 9, 1932. [Class 40 (ii).] In photographic sound-recording, distortion arising from decrease in the resolution of the sound record as the frequency of the recorded sound increases is obviated by shifting the median line of the record in accordance with the decrease in resolution. For this purpose, the high prequency components of the electrical impulses produced by the sound are isolated, and employed to modify the mean position of the recording beam. The apparatus shown for carrying out the invention comprises a galvanometer type of recorder 14 which is of usual construction except that associated with the mirror 22 are two actuating coils 16, 17. One of these, 16, is connected directly to the output of the amplifier 13 in circuit with the microphone 10, and the coil 17 is connected to the output of a rectifier 34, 35 which is fed by an auxiliary high-frequency responsive circuit 15, the input of which is connected to the amplifier 13. Since the coil 17 responds only to the higher frequency components of the sound being recorded, it shifts the mean position of the light beam in accordance with the changes in the resolving power of the film at different frequencies. Thus the mean transmission of the film is made constant for all useful frequencies.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US405477XA | 1932-05-09 | 1932-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB405477A true GB405477A (en) | 1934-02-08 |
Family
ID=21911585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9099/33A Expired GB405477A (en) | 1932-05-09 | 1933-03-25 | Photographic recording of sound |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB405477A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE740897C (en) * | 1937-01-20 | 1944-02-29 | Klangfilm G M B H | Elimination of the thunder effect in the photographic recording of tones or the like. |
| WO2005044354A1 (en) | 2003-11-03 | 2005-05-19 | Glaxo Group Limited | A fluid dispensing device |
-
1933
- 1933-03-25 GB GB9099/33A patent/GB405477A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE740897C (en) * | 1937-01-20 | 1944-02-29 | Klangfilm G M B H | Elimination of the thunder effect in the photographic recording of tones or the like. |
| WO2005044354A1 (en) | 2003-11-03 | 2005-05-19 | Glaxo Group Limited | A fluid dispensing device |
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