2023 Fiscal Year Research-status Report
Mixed sound imaging with separation capability using optical technique
| Project/Area Number |
23K19121
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
ラジプット スディーシュ 京都工芸繊維大学, その他部局等, 特任研究員 (10874448)
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| Project Period (FY) |
2023-08-31 – 2025-03-31
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| Keywords | Phase measurement / Sound field imaging / Digital holography |
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| Outline of Annual Research Achievements |
We have improved reconstruction of voice data by using optical setup of parallel phase-shifting digital holography(PPSDH). I tried to record the multiple sound sources.
We explored existing system for an optical voice security of anticounterfeiting scheme that utilizes the optical recording of voice data using optical microphone based on PPSDH.
In an another direction, we developed a voice or acoustic signal authentication method based on similar concept by checking it with several recorded sound/voice sources. The proposed system is advantageous in testing different acoustic signals at 3D sensitive locations due to use of the holographic microphone recording.
Now we are constructing new setup to be used for proper separation and recording of multiple sound sources.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We have improved reconstruction of voice data by using optical setup of parallel phase-shifting digital holography(PPSDH). I tried to record the multiple sound sources.
Progress is very close to what I planned because the system started to give preliminary results. From the constructed system, we explored anticounterfeiting and authentication of different sound signals. The PPSDH system has also been used for temperature tomography by measuring phase distribution and by use of computed model.
Tried to find out suitable filtering methods to be used for voice separation.
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| Strategy for Future Research Activity |
We plan to re-construct/modify existing setup by using some new advanced optical components for good recording of multiple sound sources. Planned and figured out deep learning or advanced filtering options are suitable to be used for proper separation.
Above steps may take 6 months in execution.
An alternative way to figure out different acoustic signal from recorded multiple sources could be through optical authentication. For that, we have also some testing and got some preliminary results of sound authentication by adding optical correlator in the system.
The new constructed optical setup will also be used to measure 3D phase distribution for temperature tomography.
Some non-interferometric algorithms will also be checked to measure 3D phase distribution.
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| Causes of Carryover |
We find out more appropriate optical system design that con be constructed by some modifications. Now, we are re-constructing optical setup that needs few additional optical components to be purchased. So, incurring amount will be used to buy some more components in addition to this year plan.
Also, it was not possible to send results in conference last year. So, I am sending results in conferences this year and will present results there. Therefore, some part of incurring amount will be used this year for presenting results in conferences.
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