2017 Fiscal Year Research-status Report
Morpho-acoustic sensitivity analysis of the human outer ear
| Project/Area Number |
17K00260
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| Research Institution | National Institute of Information and Communications Technology |
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Principal Investigator |
MOKHTARI Parham 国立研究開発法人情報通信研究機構, 脳情報通信融合研究センター脳機能解析研究室, 主任研究員 (00395089)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | Spatial Hearing / Pinna Geometry / Acoustic Resonance / Computer Simulation / FDTD |
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| Outline of Annual Research Achievements |
First, I setup a high-spec computer suitable for acoustic simulations: (1) a desktop workstation (HP-Z440) was procured and setup with CentOS 7 (Linux) OS, (2) its 2 internal hard-disks were configured as a single logical volume, and (3) for a complete backup, an external hard-disk was procured and setup with a matching xfs filesystem.
Second, I improved my FDTD acoustic simulation C-program: (1) the code structure was redesigned to allow better modularity and greater efficiency in specifying new acoustic landscapes, (2) significant code was added to enable simulation with explicit boundary-surface impedance for improved accuracy, and (3) Matlab scripts were developed to post-process FDTD output (align velocity and pressure signals, and reduce the required hard-disk storage space).
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Progress in the first year was almost exactly as planned. The only issue I did not have time to complete, was evaluation of the precise position of the KH-integration surface, but this is not a critical issue at this time.
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| Strategy for Future Research Activity |
As progress was smooth so far, I plan to continue in the 2nd year according to my original research plans. In particular, with my improved simulation program I will investigate the correspondence between acoustic sensitivity results obtained by my semi-analytic method (Mokhtari et al., 2013) versus explicit perturbation (Mokhtari et al., 2010), first with simple resonator geometries such as a flanged uniform pipe. If initial results are promising, I hope to submit a paper for presentation at an international conference (USA, Feb 2019).
Additionally, I am now running my improved simulation program with the aim of significantly expanding my HRTF PCA results (Mokhtari et al., 2012). If the new results are good, I hope to submit a journal article on this topic within this 2nd fiscal year.
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| Causes of Carryover |
An amount of 171008 Yen was not used in the 1st year, mainly because the purchased high-spec computer turned out to be less expensive than expected. In the current (2nd) year, I will distribute this left-over amount towards attendance at an international conference and purchase of analysis software.
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