Abstract
Direction of arrival (DOA) estimation for multiple sound sources with only two sensors as the human being does is proposed. The frequency domain binaural model (FDBM) [Nakashima et al., Acoust. Sci. Technol. 24, 172–178 (2003)] was proposed as one binaural model. The method uses sound diffraction to estimate DOAs and segregate sound sources. The binaural model can estimate one‐dimensional DOA, namely, azimuth. However, human beings can estimate not only azimuth of DOA but also elevation of that. In order to achieve an estimate of both azimuth and elevation simultaneously, a new DOA estimation algorithm based on interaural phase and level differences is proposed as a part of frequency domain binaural model. Results of DOA characteristics of the proposed binaural model estimation on multiple sound sources’ condition is compared with that of human auditory characteristics. As a result, it was confirmed that performance on accuracy of DOA estimation depends on power level ratio among sound sources. [Research was partially supported by the Ministry of Education, Science, Sports and Culture, Grant‐in‐Aid for Scientific Research (C), 2006, 18500135 and carried out by the Cooperative Research Project Program of the RIEC, Tohoku University (Grant No. H16.A02).]
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