Circular microphone array for meeting system

Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498) Pub Date : 2003-10-22 DOI:10.1109/ICSENS.2003.1279114

Y. Tamai, S. Kagami, H. Mizoguchi, K. Sakaya, K. Nagashima, T. Takano

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引用次数: 17

Abstract

This paper describes two circular microphone arrays and a square microphone array which may be used for sound localization and sound capture. Sound capture by microphone array is achieved by Sum and Delay Beam Former (SDBF). A dedicated PCI 128-channel simultaneous input analog-to-digital (AD) board is developed for a 128-channel microphone array with a maximum sampling rate of 22.7 /spl mu/s/sample. Our 128-channel circular microphone array is under construction, but a 24 channel circular microphone array and a 128 channel square microphone array have been completed. The 24 channel circular microphone array can capture sound from an arbitrary direction. The 128-channel square microphone array can capture sound from a specific point. The 24-channel circular microphone array and the 128-channel square microphone array are evaluated by using frequency components of the sound. The 128-channel circular microphone array is evaluated by simulations of the sound pressure distribution. These microphone arrays will be used as the capture method of "a meeting system " which automatically takes minutes of a conference.

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用于会议系统的圆形麦克风阵列

本文介绍了两种圆形麦克风阵列和一种方形麦克风阵列，可用于声音定位和声音捕获。麦克风阵列的声音捕获是通过和波束延迟前(SDBF)实现的。针对128通道麦克风阵列，开发了一种专用的PCI 128通道同步输入模数(AD)板，最大采样率为22.7 /spl mu/s/sample。我们的128声道圆形麦克风阵列正在建设中，但24声道圆形麦克风阵列和128声道方形麦克风阵列已经完成。24通道圆形麦克风阵列可以从任意方向捕获声音。128声道方形麦克风阵列可以捕捉特定点的声音。利用声音的频率分量对24声道圆形传声器阵列和128声道方形传声器阵列进行了评价。通过模拟声压分布，对128声道圆形传声器阵列进行了评价。这些麦克风阵列将被用作“会议系统”的捕获方法，该系统可以自动记录会议记录。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498)

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