| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
This study deals with the technology of spatial recording of acoustical signals and aims to improve the spatial resolution by introducing the soft computing technology.
The optimization of a neural-network-based microphone-array system was achieved by determining the system parameters and the neural-network-learning parameters using a genetic algorithm. Then the system was expanded to learn super-directivities for multiple frequencies. As a result, the super-directivities for sinusoidal signals with various frequencies were yielded. Finally, we developed a wideband system in which an input complex tone is decomposed into sinusoidal components using the fast Fourier transform, and processed in parallel with independent array-processing units.
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