摘要
采用球形正十二面体声源及其空间定位系统,测量并建立了KEMAR人工头的近场头相关传输函数(HRTF)数据库。基于数据库分析了近场HRTF在频域和时域随声源距离变化的规律;讨论了用近场HRTF算得的双耳声级差(TLD)和双耳时间差(ITD)所包含的声源距离定位信息。结果表明,测量系统和所得数据具有较好的重复性和准确性,保留了1 kHz以下的低频定位信息。并且,近场HRTF幅度谱和ILD随声源距离的变化明显;用相关法算得2 kHz以下频段的ITD随声源距离略有变化。本文数据库及其分析结果将为声源距离定位的应用提供基础。
A spherical dodecahedron sound source and its spatial orientation system are used to measure and establish the near-field head related transfer function（HRTF） database of a KEMAR artificial head.Base on the database,the variations of near-field HRTFs in frequency domain and time domain with the sound source distance are analyzed.The distance localization cues included in near-field interaural level difference（ILD） and interaural time difference（ITD） resulted from near-field HRTFs are evaluated.The results indicate that the measurement system and data are accurate and repeatable,and the distance localization cues at low frequency below 1 kHz are reserved in the measured data. Moreover,the magnitude responses of near-field HRTFs as well as ILD vary obviously with source distance;while the ITD below 2 kHz calculated by cross-correlation slightly vary with the source distance.The present database and analysis provide basis for the applications of sound source distance localization.
出处
《声学学报》
EI
CSCD
北大核心
2012年第4期378-385,共8页
Acta Acustica
基金
国家自然科学基金青年基金(11104082)
广东省自然科学基金博士启动项目(x21xB6100320)
广东高校优秀青年创新人才培养计划项目资助(LYM10012)
中央高校基本科研业务费专项资金(2011ZM0092)
