基于麦克风阵列声源定位技术论文.doc

毕业设计说明书 基于麦克风阵列的声源定位技术 基于麦克风阵列的声源定位技术 摘 要 声源定位技术是利用拾取语音信号，并用数字信号处理技术对其进行分析和处理，继而确定和跟踪声源的空间位置。声源定位技术在视频会议、语音识别和说话人识别、目标定位和助听装置等领域有着重要的应用。?传统的单个的拾音范围很有限，拾取信号的质量不高，继而提出了用阵列进行语音处理的方法它可以以电子瞄准的方式对准声源而不需要人为的移动，弥补单个在噪声处理和声源定位等方面的不足，阵列具有去噪、声源定位和跟踪等功能，从而大大提高语音信号处理质量。本文主要对基于阵列的声源定位技术领域中的基于时延的定位理论进行了研究，并且：阵列，声源定位，时延Based on Microphone Array for Sound Source Localization Research Abstract Sound source positioning technology is to use the microphone to pick up voice signals, and digital signal processing technology used for their analysis and processing , Then identify and track the spatial location of sound source. Acoustic source localization techniques have a variety of important uses in videoconferencing, speech recognition and speaker identification, targets’ direction finding, and biomedical devices for the hearing impaired. The pick up range of traditional single microphone is limited, the signal quality picked up is not high, then a voice processing methods with the microphone array has been proposed . It may be electronically aimed to provide a high-quality signal from desired source localization and does not require physical movement to alter these microphones’ direction of reception. Microphone array has the functions of de-noising, sound source localization and tracking functions, which greatly improved the quality of voice signal processing. The article discusses some issues of sound source localization based on microphone array, On the basis ，it studies a four element array,five element array and an multiple array positioning algorithm, then the positioning precision is analyzed. Derived some factors of the azimuth and elevation angle targets the target range of the estimation precision affected and positioning equation. And through MATLAB simulation software for its positioning accuracy of simulation. finally ，based on four yuan, five yuan of array, using the least square method ,the multiple array localization were calculated. Through the contrast of the tar