2006 Fiscal Year Final Research Report Summary
A Study on Improvements of Sound Quality of Compact Acoustic Reproduction Systems
| Project/Area Number |
16560219
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | Kansai University |
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Principal Investigator |
NOMURA Yasuo Kansai University, Faculty of Engineering, Professor, 工学部, 教授 (00103391)
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| 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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| Project Period (FY) |
2004 – 2006
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| Keywords | Headphones / Design Criterion / Standard / Head Related Transfer Function / Leakage / Measurement Methods |
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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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