| 摘要 |
<p>PROBLEM TO BE SOLVED: To determine correlation with a small number of samples and to easily determine the directions of sound sources having a slight time delay difference. SOLUTION: Two signals inputted via two microphones 101R and 101L are delayed and subtracted from each other by a phase operating circuit 110, they are applied with a correlation coefficient arithmetic process by a correlation coefficient arithmetic processing circuit 120, and their levels are compared by a level comparing circuit 130. The sound source directions inputted to two microphones are determined by a direction determining arithmetic circuit 140 based on the correlation coefficient arithmetic process result by the correlation coefficient arithmetic processing circuit 120 and the level comparison result by the level comparing circuit 130.</p> |
