基于虚拟传递函数算法的有源头靠系统

An active headrest system based on virtual transfer function

有源头靠系统中,为了扩大头部的活动范围以及提高使用者的舒适度,在虚拟传声技术的基础上,利用FXLMS算法建立物理传声器与虚拟传声器之间的传递函数模型,可估计人耳附近的噪声信号。仿真结果表明,提出的方法能够估计出虚拟位置的噪声信号并有效衰减,在人耳处产生静音区域,与两阶段法相比有更好的降噪效果。

In the active headrest system, in order to expand the range of activity of head and improve the comfort of the user, the transfer function model between the physical and virtual microphone is established according to the previous virtual microphone technique and the FXLMS algorithm, and the noise near the passengers＇ ears is estimated. The simulation results show that the method presented in this paper can estimate the noise signal of the virtual location and reduce the noise effectively, and generate a quiet zone at the human ears, which has better performance compared with the two-phase method.