Active noise control assuming quiet zone move
Active noise control assuming quiet zone move
复制标题
假设安静区移动的主动噪声控制
DOI：
10.1299/kikaic.74.1273
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Toshihiko Higashi
中科院分区：
文献类型：
--
作者：
I. Ikeda;S. Kijimoto;Koichi Matsuda;Yosuke Koba;Toshihiko Higashi
本文研究了以办公室为例的三维声场中的主动噪声控制问题。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，本文研究了绕头控制。为了实现绕头控制，在控制过程中需要一个与头部运动相对应的评价点。然而，在传统的ANC中，没有考虑到控制时评价点的移动。针对这一问题，本文提出了一种新的算法。该算法通过使用延时滤波器和距离衰减系数计算位置的函数滤波器。从评价点的位置计算时延滤波器和距离衰减系数。对消声室和普通房间的声学特性进行了计算机模拟。仿真结果表明了该算法的有效性。
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, the new algorithm is proposed in this paper. The algorithm calculates filters as function of position by using a Time-Delay filter and a Distance-Attenuation coefficient. The Time-Delay filter and the Distance-Attenuation coefficient are calculated from the position of the evaluation point. Computer simulations with acoustic characteristics in an anechoic chamber and an ordinary room are carried out. The validity of the proposed algorithm is shown from these simulations.