Abstarct: One of the most important issues in array processing field is acoustic source localization. Two-phased algorithms are the most common recommended techniques because of their speed in implementing and updating. In these algorithms, at first phase, the time difference of arrivals (TDOA) of acoustic signal received at microphone pairs must be computed, then, some equation form and location of acoustic source estimate. The most common method for computing the difference of arrival signals is Cross-Correlation. Because of being impressed by noise and environmental reverberation, this method is optimized by some prefilters. Acquired method known as a Generalized Cross-Correlation. One of the filters that have appropriate response is PHASE Transform also known as CPSP. The most appropriate method for solving the equations resulted from applying TDOAs computed in the first phase is CHAN's method. This algorithm finds an approximate realization of the maximum-likelihood estimator. In this research, the techniques for localizing the sound source in 3 dimensional space, and especially CPSP method for first phase and Chan method for second phase, have been reviewed. The mentioned algorithms have been implemented by software and hardware and required instrument and equipment are designed. Finally, some experiments are performed for validating the accuracy of implemented algorithms. Experiments have been done for fix and moving acoustic sources, different microphone arrangements, several signal to noise proportions, frxames with different number of samples and arrays with different number of microphones. According to results, special arrangement that have the best response, is introduced. Also, for fix source, the point recommended as a suitable location for localization. Finally, the effect of changes in samples of processed frxame and the effect of increasing the number of microphones in array are analyzed. Finally, the overall results of experiments and implemented algorithms and some techniques for future work are mentioned.