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全数字式扬声器阵列系统的设计与实现 被引量：3

Design and Implementation of All-Digital Loudspeaker Array System
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摘要 为了改善PWM调制技术存在的非线性失真和过采样速率较低的缺陷,近年来许多学者都致力于研究基于∑-Δ调制技术的全数字式扬声器系统的实现方法。在参考前人研究工作的基础上,给出了基于1 bit和3 bit编码方式的64元全数字式扬声器阵列系统的设计和实现方法,并在全消声室内测试了系统的频响、总谐波失真比和声场分布曲线,同时基于测试结果评价了系统性能。 To improve the nonlinear distortion and the lower oversampling rate in PWM modulation mode, in recently years, many researchers are engaged in the research and development of the SDM - based （ Sigma - Delta Modulation） digital loudspeaker systems. Based on their achievements, the design and implementation of the 64 - element all - digital loudspeaker array based on the 1 - bit and 3 - bit SDM methods are presented in this paper. The frequency response, THD （ Total Harmonic Distortion） and the distribution of the sound pressure field are measured in the anechoic room and the performance of this system is evaluated based on these curves.
作者 马登永 蔡野锋 沐永生 杨军 周建明 柴国强
机构地区 苏州上声电子有限公司 中国科学院声学研究所通信声学实验室
出处 《电声技术》 2011年第11期25-29,共5页 Audio Engineering
关键词 全数字式扬声器阵列 多比特∑-Δ调制 失配整形 声场叠加 all - digital loudspeaker array muhi - bit sigma - delta modulation mismatched shaping sound superposition
分类号 TN643 [电子电信—电路与系统]
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参考文献11

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共引文献5

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电声技术
2011年 第11期

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