| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and a method, for an acoustic positioning operation for a sailing noise performing a Doppler correction, in which the sailing noise generated by a sailing body is received by a plurality of receivers on the basis of a fact that the running speed of a sound source is found from a received signal by a receiver, and in which the position of the running body is detected. SOLUTION: In this positioning apparatus, the radiant noise of a running body is received by two or more receivers, and the direction of a sound source is found by finding a correlation between received signals. The apparatus is constituted in such a way that a receiver A 5, a receiver B 6, a receiving circuit 7, a receiving circuit 8, an A/D converter 9, an A/D converter 10, an FFT processor 11, an FFT processor 12, a storage device 13, a storage device 14, a frequency band detector 15 for a running noise caused by the vibration characteristic of the running body, a band-pass filter processor 16, a band-pass filter processor 17, a sailing- body speed detector 18 by a Doppler frequency, a Doppler-correction computing unit 19, a correlation computing unit 20, and a display 21, are provided. Then, when the sound source is running at high speed, the influence of a Doppler effect generated between received signals received by two or more receivers is corrected, the maximum value of the correlation between the respective received signals is calculated precisely, the difference in the arrival time up to the respective receivers of the radiant noise of the running body is detected, and the position of the sound source is specified.
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