A Study On Sound Source Localization Technology Based On Microphone Array

Localization of sound source is an interesting course of study which will be widely applied in our future life.Sound source localization is realized by processing sound signals, differing from the localization method with sonar, radar or wireless communication in the type of signals. Sound is a wide-band signal, while the later are narrow-band signals. Many sound source localization algorithms are proposed aiming at the characteristic of sound signals. However, signal's quality, background noise and room reverberations in enclosure greatly degrade the effectiveness of acoustic source localization. For solve these question, some work are accomplished in this paper.Foremost, the microphone array is generally described, and some issues of sound source localization based on microphone array are discussed. The particularities of signal processing based on microphone array and the cause and influence of reverberation are analyzed. Some main methods of sound source localization are compared. A sound source localization method based on the time delay estimation is analyzed with emphasis. Several time-delay estimation methods are studied. The improvement Cross-power Spectrum Phase (CSP) time delay estimation method and time-delay estimation method based on onset signal and Cross-power Spectrum Phase is given. Finally, several geometries locating methods and the objective function space search locating method are simply introduced.A sound source localization system based on the PCL-818HG data acquisition card produced by Advantech CO., Ltd is designed. Finally, Some Experiment is conducted on the system, and the experimental result is presented. The results showed that further study on sound source localization can be made on the sound source localization system.