| Co-Investigator(Kenkyū-buntansha) |
KAJIKAWA Yoshinobu Kansai University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30268312)
OHGA Juro Shibaura Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (30327754)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Research Abstract |
In this research, we have studied the following three targets on compact acoustic reproduction systems (e.g. headphones, mobile phones). First, we have explored design criteria for headphones. Second, we have established measurement methods for headphones. Finally, we have constructed a design support system for compact acoustic reproduction systems. In the first research, we have examined what design criteria the headphones should be designed based on. As a result, we have demonstrated that the head related transfer function is a design criterion for headphones through some subjective assessment experiments. In the second research, we have examined what effect acoustic leakage has on the frequency response of headphones. As a result, we can clarify that the amount of acoustic leakage affects the frequency response of headphones, especially, lower frequency band. In the third research, we have clarified the relation between physical sizes of acoustic reproduction systems and the corresponding acoustic parameters on the acoustic equivalent circuit. As a result, we can derive novel acoustic theoretical formulae and construct a novel design support system. In the future, we will examine the effectiveness on the design criteria, measurement methods, and design support system we have derived through some field researches.
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