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Analysis of acoustic MIMO systems in enclosed sound fields

机译:封闭声场中的声学MIMO系统分析

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Methods for room acoustic analysis based on a single loudspeaker and a single microphone have been extensively studied, both theoretically and experimentally. Although measurement techniques for acquiring and processing spatial information in a room using arrays of loudspeakers and microphones have been recently proposed, the current literature in room acoustics does not describe the use of multiple-input multiple-output (MIMO) systems in a comprehensive manner. The aim of this paper is, therefore, to present an initial theoretical framework for the spatial analysis of enclosed sound fields using an acoustic MIMO system, based on a spherical loudspeaker array and a spherical microphone array. The fundamental characteristics of the system transfer matrix are shown to be invariant to rotation of the arrays, with its rank dependant on the number of reflections in the room. The paper concludes with a simulation study validating the theoretical models.
机译:在理论上和实验上已经广泛研究了基于单个扬声器和单个麦克风的房间声学分析方法。尽管最近已经提出了使用扬声器和麦克风的阵列来获取和处理房间中的空间信息的测量技术,但是当前房间声学中的文献并未以全面的方式描述多输入多输出(MIMO)系统的使用。因此,本文的目的是为基于球形扬声器阵列和球形麦克风阵列的声学MIMO系统提供一种用于封闭声场空间分析的初始理论框架。系统传输矩阵的基本特征显示为阵列旋转不变,其等级取决于房间中的反射次数。本文最后通过仿真研究验证了理论模型。

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