参量阵扬声器在管道噪声控制中的可行性研究

Feasibility Study of Duct Active Noise Control Using Steerable Parametric Array

参量阵扬声器具有强指向性,因此在管道有源噪声控制中,如果参量阵扬声器可以作为次级声源,那么将会可以减小声反馈,简化噪声控制的算法。为了获知参量阵扬声器的管道噪声控制可行性,对其在管道内的声场进行了仿真和实验。结果表明,参量阵扬声器具有与普通扬声器相同的传播特性,可以用于管道有源噪声控制,并且相比普通扬声器具有更小的声反馈。

It is known that parametric array loudspeakers could produce very highly directional sound beam. Supposing that parametric array loudspeakers are used as the secondary source of active noise control （ANC） in ducts, the acoustic feedback can be reduced and algorithms will be simplified. In order to confirm the feasibility, simulations and experiments are conducted in ducts. Results show that parametric array loudspeakers have the same propagation characteristics with loudspeaker and can be used for active noise control. Furthermore, parametrie array loudspeakers have weak acoustic feedback.