头相关传输函数空间对称性的分析

提出了分析头相关传输函数空间对称性的方法。利用对KEMAR人工头/躯干系统和真人受试者进行测量得到的头相关传输函数,分析了生理结构对头相关传输函数空间对称性的影响。结果表明,在5 kHz至6 kHz以上的频率,耳廓破坏了头相关传输函数的前后对称性;而受耳道入口位置的影响,真人受试者的头相关传输函数在2.5 kHz以上的频率就开始出现前后不对称。另一方面,在中、低频的情况下,头相关传输函数近似左右对称,然而随着频率的升高,生理外形在细微结构上的左右差异将导致头相关传输函数的左右不对称。这种左右不对称的起始频率和程度存在个体差异。上述分析可以反映出头相关传输函数空间对称性的规律和现有双耳听觉模型的适用范围。

Analysis on the spatial symmetry of head-related transfer function

Methodsfor analyzing the spatial symmetry of Head-Related Transfer Function(HRTF)are proposed.The influences of anatomical structures on the symmetry of HRTF are investigated using HRTFs measured on KEMAR mannequin and human subjects.Resultsshow that for KEMAR mannequin,pinnae destroy the front-back symmetry of HRTF above 5~6 kHz,while for human subjects it reduces to 2.5 kHz because of the locations of ears.Furthermore,at low and median frequencies,HRTF is approximately left-right symmetrical.While as frequencies increase,the asymmetry caused by the fine anatomical left-right differences appears.The starting frequency and the extent of the left-right asymmetry in HRTF depend on individuals.The analyses can demonstrate the spatial symmetrical characteristics of HRTF,and the frequency ranges in which current binaural models are valid