TY - JOUR AU - Huang, Qinghua AU - Wang, Tong PY - 2014 DA - 2014/06/14 TI - Acoustic source localization in mixed field using spherical microphone arrays JO - EURASIP Journal on Advances in Signal Processing SP - 90 VL - 2014 IS - 1 AB - Spherical microphone arrays have been used for source localization in three-dimensional space recently. In this paper, a two-stage algorithm is developed to localize mixed far-field and near-field acoustic sources in free-field environment. In the first stage, an array signal model is constructed in the spherical harmonics domain. The recurrent relation of spherical harmonics is independent of far-field and near-field mode strengths. Therefore, it is used to develop spherical estimating signal parameter via rotational invariance technique (ESPRIT)-like approach to estimate directions of arrival (DOAs) for both far-field and near-field sources. In the second stage, based on the estimated DOAs, simple one-dimensional MUSIC spectrum is exploited to distinguish far-field and near-field sources and estimate the ranges of near-field sources. The proposed algorithm can avoid multidimensional search and parameter pairing. Simulation results demonstrate the good performance for localizing far-field sources, or near-field ones, or mixed field sources. SN - 1687-6180 UR - https://doi.org/10.1186/1687-6180-2014-90 DO - 10.1186/1687-6180-2014-90 ID - Huang2014 ER -