| Project/Area Number |
23656165
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Dynamics/Control
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
TANAKA Nobuo 首都大学東京, システムデザイン研究科, 名誉教授 (70305423)
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| Co-Investigator(Kenkyū-buntansha) |
IWAMOTO Hiroyuki 成蹊大学, 理工学部, 准教授 (90404938)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 能動騒音制御 / パラメトリックスピーカー / 波面合成 / パラメトリックスピーカ |
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| Research Abstract |
The objective of this study is to develop an extensible and steerable parametric array loudspeaker which enables to manipulate both of the direction and length of audible sound beam. First, it is clarified that by steering two ultrasound beams with different frequencies to different directions, direction and length of the region where the two beams are overlapped can be modified. Next, it is experimentally demonstrated that audible sound is produced in the region where the two frequencies exists. Finally, by adjusting a coefficient of an all pass filter, the method for smoothly manipulating the audible sound beam.
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