Measurement of individual pinna rotation angle and customization of head-related transfer functions

作者：Yu, Guang-Zheng; He, Ying-Yang; Li, Zhe-Lin

来源：Journal of South China University of Technology(Natural Science Edition), 2016, 44(7): 135-141.

DOI：10.3969/j.issn.1000-565X.2016.00.021

• Calculation models
• Coupling modeling
• Frankfurt plane
• Head related transfer function
• Individual customization
• Measurement methods
• Rotation angles
• Spatial coordinates

The measured value of pinna rotation angle depends on subject's original head position, and the corresponding measurement methods of pinna rotation angle may affect the distribution of individual head-related transfer functions (HRTFs) in various elevations. In this paper, both face-based vertical reference plane and Frankfurt reference plane are used to measure and compare the pinna rotation angles of 60 human subjects, and a mean diffe-rence of about 5°is obtained. Then, in order to discover the effect of pinna rotation angle on the spatial distribution of individual HRTFs, the left pinna is rotated on the same ellipsoidal head model with an interval of 5°, and three calculation models respectively corresponding to the pinna rotation angles of 16°, 11°and 6°are obtained. Moreover, the HRTFs of the three coupling models are calculated and analyzed by means of the fast multi-pole boundary element method (FM-BEM). The results show that the frequency discrepancy of the pinna notches at high frequencies reaches about 1.0 kHz, and that the magnitude difference even reaches about 10 dB in some directions. In addition, from the individual HRTFs customized via spatial coordinate transformation, it is found that the frequencies and magnitude of pinna notches of the customized HRTFs are similar to those of directly-calculated HRTFs, which means that the proposed individual customization method for individual pinna rotation angle is effective.

• 出版日期2016-7-1
• 单位华南理工大学