| Project/Area Number |
59890001
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
1984 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥11,900,000 (Direct Cost: ¥11,900,000)
Fiscal Year 1985: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1984: ¥8,100,000 (Direct Cost: ¥8,100,000)
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| Keywords | Bronislaw Pilsudski / Edison phonograph cylinder / Ainu culture / Stylus reproduction instrument / Laser-beam reflection instrument / 雑音除去 |
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| Research Abstract |
B. Pilsudski's sixty-five wax cylinders were brought to the Research Institute of Applied Electricity, Hokkaido University, for reproduction and investigation of the sound recorded on them. Using the Edison-type phonograph, its stylus gives such a heavy pressure of approximately 20 g to the grooves of the wax cylinder in the reproduction process that there is definitely a grest risk of damaging the wax cylinder. This is a problem because not only the sounds recorded on the wax cylinder but also the cylinder itself is part of our cultural inheritance. So a method using a very light pressure stylus was developed as a reproduction system of the sound from wax cylinders. However, there were twenty-four more cylinders that have not yet been reproduced; the stylus method cannot be used because the cylinders are cracked or in pieces. These broken wax cylinders were repaired. Since the valuable sounds of the Ainu talk and songs lost so long ago seem to be recroded on these cylinders, reproduction is most important. To reproduce the sounds from these repaired cylinders, the laser-beam reflection method which is noncontacting and nondestructive was developed.
The present research was done by following the four steps: (1) Cleaning and replication of the wax cylinders, (2) Sound reproduction using the tylus method and the laser-beam reflection method which were newly developed, (3) Noise reduction for two different spike-like noise and random noise.
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