| 摘要 |
The sound waves (15) are received from a receiver assembly (12) and the relative directions (21a-21c) of the sound waves are determined. The relative direction is associated with the magnitude spectrum. The frequency domains of each magnitude spectrum are determined. The amplitude values in one of the frequency bands are summarized as frequency band amplitude values corresponding to magnitude spectrum, when the number of frequency band amplitude values is above the threshold level (31) and the specified detection number (33). An independent claim is included for device for determining one or more of relative moving directions of moving objects. |
