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.
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 . 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, Some main methods of sound source localization are compared. A sound source localization method based on the time delay estimation is analyzed with emphasis,position angle distance method and spherical interpolation methods are also 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.
Keywords: Microphone Array, Sound Source Localization, Time Delay Estimation, Cross-power Spectrum Phase, PCL-818HG, Data Acquisition