Active Noise Control with a Moving Evaluation Point
Active Noise Control with a Moving Evaluation Point
复制标题
具有移动评估点的主动噪声控制
DOI：
10.1299/jsdd.2.362
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Yosuke Koba
中科院分区：
文献类型：
--
作者：
I. Ikeda;S. Kijimoto;Koichi Matsuda;Yosuke Koba
本文以办公室为例，研究了三维声场中的有源噪声控制问题。由于控制区域的大小通常取决于目标噪声的波长，因此使用ANC技术很难在整个房间内进行控制。相反，本文研究的是绕头部控制问题。为了实现对头部周围的控制，在控制时需要一个与头部运动相对应的评价点。然而，在传统的自适应神经网络中，并没有考虑控制点的移动。针对这一问题，提出了一种新的算法。该算法利用时滞滤波和距离衰减系数来更新滤波器。从评价点的位置计算时滞滤波和距离衰减系数。进行了计算机仿真，验证了新算法的有效性。
Active noise control (ANC) in 3-dimensional sound field, e.g. an office room, is investigated in this paper. Since the size of the controlled area normally depends on the wave length of the target noise, it is difficult to control in the whole room using ANC technique. Instead, around-head-control is investigated in this paper. To realize the around-head-control, an evaluation point is required to correspond with the head movement while controlling. However, the evaluation point movement while controlling has not been considered in a conventional ANC. Against this problem, a new algorithm is proposed in this paper. The algorithm updates filters by using Time-Delay filter and Distance-Attenuation coefficient. Time-Delay filter and Distance-Attenuation coefficient are calculated from the position of the evaluation point. The computer simulations are carried out, and the validity of the new algorithm is shown.