Iterative optimization algorithm for sound localization

摘要

A seven-microphone array with three microphones in each axis is presented in this paper. Self-calibration can be achieved with the array structure in three-dimensional space. A traditional generalized cross correlation is used to obtain the time-delay among microphones. Then, we proposed a resolving algorithm based on the iterative optimization. Accurate sound source localization can be realized by approaching the target for not only far field but also near field with the numerical solution constantly. Experimental results demonstrate a good performance in localization. It should be emphasized that the space of RAM and ROM occupied by algorithm is small and the speed of computation is fast. Last but not least, traditional approximate formulas are based on the localization of far-field, but our iterative optimization algorithm can be applied accurately for both far-field and near-field.