Non-Uniform Secondary Source Distribution for 2.5D Higher Order Ambisonics Sound Field Synthesis

DONG Shi; ZHANG Qiang; XIE Xia-feng; ZHONG Rui

doi:10.12263/DZXB.20200010

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Non-Uniform Secondary Source Distribution for 2.5D Higher Order Ambisonics Sound Field Synthesis

更新时间：2025-12-08

- Non-Uniform Secondary Source Distribution for 2.5D Higher Order Ambisonics Sound Field Synthesis
- Acta Electronica Sinica Vol. 49, Issue 1, Pages: 14-22(2021)
- 作者机构：
  
  1. 华中师范大学教育信息技术学院,湖北,武汉,430000
  2. 华中师范大学计算机学院,湖北,武汉,430000
  3. 华中师范大学教育信息技术学院,湖北,武汉,430000
  4. 华中师范大学计算机学院,湖北,武汉,430000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61702472);Fundamental Research Funds for the Central Universities (No.CCNU17XJ012)
- DOI：10.12263/DZXB.20200010
  CLC： TN911
- Published Online：25 January 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
DONG Shi, ZHANG Qiang, XIE Xia-feng, et al. Non-Uniform Secondary Source Distribution for 2.5D Higher Order Ambisonics Sound Field Synthesis[J]. Acta Electronica Sinica, 2021, 49(1): 14-22.
DOI：

DONG Shi, ZHANG Qiang, XIE Xia-feng, et al. Non-Uniform Secondary Source Distribution for 2.5D Higher Order Ambisonics Sound Field Synthesis[J]. Acta Electronica Sinica, 2021, 49(1): 14-22. DOI： 10.12263/DZXB.20200010.

摘要

为了提高感兴趣区域音源的声场合成质量，提出了一种非均匀二次声源分布的声场分析与合成方法.首先，将连续二次声源的采样分为两个不同的采样区域，在总扬声器数目一定的情况下，增大感兴趣区域的样点数目并减少感兴趣区域外样点数目.然后，利用采样混叠矩阵的Hermitian特性，使用瑞利熵来估计不同非均匀采样方案的最大误差，以指导非均匀采样方案的选择.最终得到非均匀二次声源驱动信号的频域计算方法.实验结果表明在2.5D圆形区域边界下，所提非均匀排布方法与典型的均匀排布的最佳模态带宽相比，对感兴趣区域音源的无混叠半径提高了12.9%~22.6%，验证了提出方法的有效性.

Abstract

In order to improve the sound field synthesis quality of the sound source in the region of interest

a non-uniform secondary source distribution method for sound field analysis and synthesis is proposed. First

the sampling of the continuous secondary source is divided into two different sampling regions. With a certain number of loudspeakers

the number of samples in the region of interest is increased and the number of samples outside the region of interest is reduced. Then

using the Hermitian characteristic of the sampling aliasing matrix

Rayleigh entropy is used to estimate the maximum error of different non-uniform sampling schemes to guide the selection of non-uniform sampling schemes. Finally

the frequency domain calculation method of the driving signal for the non-uniform secondary source distribution is obtained. The experimental results show that the proposed non-uniform distribution method improves the aliasing-free radius by 12.9%~22.6% for the sound sources from the region of interest under the 2.5D circular boundary condition

compared with the optimal modal bandwidth of the uniform distribution. The effectiveness of the proposed method is verified.

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