| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Research Abstract |
The purpose is an methodology for building a small acoustic space that produces little audible sound at the intersection of multiple ultrasonic beams. We introduced a method that makes a phase difference between two transducers arranged side by side 180 degrees in a cluster of transducers. We made good progresses in three methodologies(1) particularly reduce the sound out of the acoustic space,(2) weaken the strength of sound by transducers in a concentrate circle, and(3) focusing ultrasonic beams inside of the strait line, and in their multiple effects.
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