摘要
介绍了基于传声器线性阵列的常规相移-时延波束形成理论,分析了线性传声器阵列的指向性以及影响其指向性的因素,并对其空间增益进行了定性分析;提出了一种基于传声器阵列的宽带自适应恒定束宽波束形成方法,在整个工作频带内波束宽度基本保持大致相等,可有效抑制因波束形成带来的音色畸变;给出了相应的波束形成仿真结果。
Conventional phase shift-time delay beamforming method based on microphone linear array is introduced here. The directivity and the factors which influence the directivity of the linear microphone array are analysed. The space gain of linear microphone array is also analysed qualitatively. An adaptive broadband constant beamwidth beamforming method is proposed here, and it will restrain the timbre aberration effectively with constant beamwidth in the whole work frequency band. Finally, the corresponding simulation result is given.
出处
《电声技术》
2006年第9期23-25,29,共4页
Audio Engineering
