Wave-source-direction estimation device, wave-source-direction estimation method, and program storage medium

A wave-source-direction estimation method implemented by an information processing device, the wave-source-direction estimation method comprising:

• acquiring, as input signals, electrical signals that have been converted from waves acquired by a plurality of sensors;
• selecting at least two pairs that are each a combination of at least two input signals from among a plurality of the input signals;
• calculating, as relative delay times, arrival time differences of the waves for each wave source searching direction between the at least two input signals composing one of the pairs of the input signals;
• using the pairs of the input signals and the relative delay times to generate at least one piece of estimated direction information on a wave source of the waves for each frequency;
• and
• integrating the estimated direction information generated for each frequency.

A non-transitory program storage medium having stored therein a program for causing a computer to execute:

• a process of acquiring, as input signals, electrical signals that have been converted from waves acquired by a plurality of sensors;
• a process of selecting at least two pairs that are each a combination of at least two input signals from among a plurality of the input signals;
• a process of calculating, as relative delay times, arrival time differences of the waves for each wave source searching direction between the at least two input signals composing one of the pairs of the input signals;
• a process of using the pairs of the input signals and the relative delay times to generate at least one piece of estimated direction information on a wave source of the waves for each frequency;
• and
• a process of integrating the estimated direction information generated for each frequency.