Matsumoto Mitsuharu, Hashimoto Shuji
Department of Applied Physics, Waseda University, 55N-4F-10A, 3-4-1 Okubo, Shinjiku-ku, Tokyo 169-8555 Japan.
J Acoust Soc Am. 2006 Jan;119(1):352-9. doi: 10.1121/1.2141232.
This paper introduces a miniaturized microphone array using the Directionally Constrained Minimization of Power (DCMP) method, which utilizes the transfer functions of microphones located at the same place, namely aggregated microphones. The phased microphone array realizes a noise reduction and direction of arrival (DOA) estimation system according to differences in the arrival time, phase shift, and/or the level of the sound wave for each microphone. Hence it is difficult to miniaturize the microphone array. The objective of our research is to miniaturize the system size using aggregated microphones. In this paper, we first show that the phased microphone array system and the proposed aggregated microphone system can be described within the same framework. We then apply a microphone array under directional constraint to the aggregated microphones and compare the proposed method with the microphone array. We show the directional pattern of the aggregated microphones. We also show the experimental results regarding DOA estimation.
本文介绍了一种采用定向约束功率最小化（DCMP）方法的小型化麦克风阵列，该方法利用位于同一位置的麦克风的传递函数，即聚合麦克风。相控麦克风阵列根据每个麦克风接收到的声波的到达时间、相移和/或声级差异，实现了一个降噪和到达方向（DOA）估计系统。因此，很难将麦克风阵列小型化。我们研究的目标是使用聚合麦克风来减小系统尺寸。在本文中，我们首先表明相控麦克风阵列系统和所提出的聚合麦克风系统可以在同一框架内进行描述。然后，我们将定向约束下的麦克风阵列应用于聚合麦克风，并将所提出的方法与麦克风阵列进行比较。我们展示了聚合麦克风的方向图。我们还展示了关于DOA估计的实验结果。
