一维噪声的有源控制

传统的无源吸振技术难以解决低频噪声控制问题，有源噪声控制（ＡＮＣ）是解决低频噪声控制问题的有效方法。有源噪声控制（ＡＮＣ）通过引入可以控制的次级声源使其和主噪声源干涉相消而达到的降噪的目的。介绍了常用的几种有源噪声控制（ＡＮＣ）算法，对常用ＡＮＣ算法的性能进行了分析，并结合仿真结果对常用的ＡＮＣ算法进行了评价。最后对算法的选择提出了建议，并对ＡＮＣ的未来发展进行了展望。

ACTIVE NOISE CONTROL IN A DUCT

Conventional methods of suppressing acoustic noise using passive sound absorbers generally do not work well at low frequencies. Active noise control (ANC) is an efficient method to solve this problem. ANC introduces a controlled secondary source driver so that the field generated by this source interferes destructively with the field caused by the primary source. Several active noise control (ANC) algorithms often used in practice are introduced, the performances of the ANC algorithms are analyzed, and some evaluations on the ANC algorithms are given according to simulation results. In the end, several propositions and the future prospects are mentioned.