电子学报2017，Vol.45Issue(3)：520-526,7.DOI:10.3969/j.issn.0372-2112.2017.03.002
基于高阶Ambisonics的2.5维近场声源合成
2.5D Near-Field Sound Source Synthesis Using Higher Order Ambisonics
摘要
Abstract
In the spatial acoustic signal processing,for the issue of dimensionality mismatch between 2-dimensional (2D) sound field synthesis and practical sound source,and the issue of near-field distortion in the near-field sound source synthesis,this paper presents a 2.5-dimensional (2.5D) sound field synthesis method and a modified Wiener filter method for near-field compensation.The 2.5D sound field synthesis is achieved using the spherical harmonics expansion of higher order ambisonics (HOA).The modified Wiener filter is used to compensate the near-field distortion which arises when HOA is utilized to reproduce a 2.5D near-field sound source.Based on the concept of continuous loudspeaker array hypothesis,a general expression of the loudspeaker driving signal is derived.The experiments show that the proposed method reduced the relative error of the synthesized 2.5D near-field from 0.23 to 0.031 in comparison with the cosine regularization method.Meanwhile,the proposed method provides a larger effective listening area compared with the high-pass filter method.关键词
声信号处理/声场合成/扬声器阵列/球谐函数Key words
acoustic signal processing/sound field synthesis/loudspeaker array/spherical harmonics分类
信息技术与安全科学引用本文复制引用
周岭松,鲍长春,贾懋珅,步兵..基于高阶Ambisonics的2.5维近场声源合成[J].电子学报,2017,45(3):520-526,7.基金项目
国家自然科学基金(No.61231015,No.61201197) （No.61231015,No.61201197）
教育部博士点新教师基金(No.20121103120017) （No.20121103120017）
北京市教委科技计划(No.KM201310005008) （No.KM201310005008）
