南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (2): 180–190.doi: 10.13232/j.cnki.jnju.2019.02.003
章康宁，卢 晶*
Zhang Kangning，Lu Jing*
摘要： 随着近年来通信便携设备的快速发展，基于扬声器阵列的声聚焦系统被广大研究者高度关注，而其声回放特性一般只能采用小尺度线性扬声器阵列来实现. 声对比度控制法通过将亮区与暗区的声能量比值最大化，将系统的声能量集中在亮区，该算法在小尺度线性扬声器阵列声聚焦的实现上有着较好的应用前景. 大多数关于声学对比度控制的分析都是基于自由场模型的，然而在实际应用场景中，混响和近场人头散射效应的影响都不容忽视，特别是在阵列尺度较小时. 重点针对这一问题开展了相应的研究，建立了一个由5单元小尺度线性扬声器阵列构成的系统模型，其将系统的声能量主要集中于阵列端射方向的亮区，在房间混响和近场人头散射的共同作用下分析系统聚焦性能的鲁棒性，并通过实验验证了实际系统的声聚焦性能．
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