| Budget Amount *help |
¥78,780,000 (Direct Cost: ¥60,600,000、Indirect Cost: ¥18,180,000)
Fiscal Year 2014: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2013: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2012: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2011: ¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2010: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
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| Outline of Final Research Achievements |
The hypersonic effect is a phenomenon in which sounds containing significant quantities of non-stationary high-frequency components (HFCs) above the human audible range activate the reward-generating neural system and improve Shitsukan perception. In this study, we investigated the relationship between the hypersonic effect and HFC frequencies. An HFC (above 16 kHz) of recorded music with various frequencies was applied to subjects along with an audible low-frequency component (LFC) below 16 kHz and the alpha2 frequency component (10-13 Hz) of spontaneous EEGs (Alpha-EEG) was measured. When an HFC above approximately 32 kHz was applied, Alpha-2 EEG increased significantly compared to when only audible sound was applied (positive hypersonic effect), while, when an HFC below approximately 32 kHz was applied, Alpha-2 EEG decreased (negative hypersonic effect). These findings suggest that the emergence of the hypersonic effect depends on the frequencies of the inaudible HFC.
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