摘要
实现了一种用于有源降噪耳机的次级通道建模方法,这种方法采用音乐片段作为激励信号,引入一个自适应误差预测器克服次级通道建模过程中遇到的干扰的影响,使得建模精度更高。对预测器中不同的延迟进行分析讨论,得出最佳延迟等于次级通道脉冲响应长度的结论。实验表明,这种方法能够较好地剔除窄带干扰对建模的影响,具有较高的实用价值。
A secondary path modeling technique for active noise cancellation headset systems is developed in this paper.Musical pieces are used as excitation signals in the technique,and adaptive prediction error filter is introduced to reduce the interference for higher modeling accuracy in secondary path modeling.Different delay are discussed in simulations.The optimum delay in the predictor is equal to the length of the impulse response of the secondary path.The experiment results show that the technology can exclude the impact of narrowband interference on the modeling.It is more practical in application.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第2期233-237,共5页
Chinese Journal of Sensors and Actuators
关键词
有源降噪
次级通道建模
自适应误差预测器
最佳延迟
active noise cancellation
secondary path modeling
adaptive error prediction filter
optimum delay
