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• W2413091134 abstract "Head-related transfer functions (HRTFs) describe the directional filtering of the incoming sound caused by the morphology of a listener's head and pinnae. When an accurate model of a listener's morphology exists, HRTFs can be calculated numerically with the boundary element method (BEM). However, the general recommendation to model the head and pinnae with at least six elements per wavelength renders the BEM as a time-consuming procedure when calculating HRTFs for the full audible frequency range. In this study, a mesh preprocessing algorithm is proposed, viz., a priori mesh grading, which reduces the computational costs in the HRTF calculation process significantly. The mesh grading algorithm deliberately violates the recommendation of at least six elements per wavelength in certain regions of the head and pinnae and varies the size of elements gradually according to an a priori defined grading function. The evaluation of the algorithm involved HRTFs calculated for various geometric objects including meshes of three human listeners and various grading functions. The numerical accuracy and the predicted sound-localization performance of calculated HRTFs were analyzed. A-priori mesh grading appeared to be suitable for the numerical calculation of HRTFs in the full audible frequency range and outperformed uniform meshes in terms of numerical errors, perception based predictions of sound-localization performance, and computational costs." @default.
• W2413091134 created "2016-06-24" @default.
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• W2413091134 date "2016-12-01" @default.
• W2413091134 modified "2023-09-30" @default.
• W2413091134 title "A priori mesh grading for the numerical calculation of the head-related transfer functions" @default.
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• W2413091134 doi "https://doi.org/10.1016/j.apacoust.2016.07.005" @default.
• W2413091134 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5321476" @default.
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