2. The voice recognition system according to claim 1 , wherein the priority determining unit uses as the predetermined priority criterion at least one selected from (1) a length of the detected voice section, (2) a power or an S/N ratio of the detected voice section, and (3) a chronological order of the detected voice section.
2. The voice recognition system according to claim 1 , wherein the priority determining unit uses as the predetermined priority criterion at least one selected from (1) a length of the detected voice section, (2) a power or an S/N ratio of the detected voice section, and (3) a chronological order of the detected voice section. 6. The voice recognition system according to claim 2 , wherein (2) the power or the S/N ratio of the detected voice section is used as the predetermined priority criterion, and the priority determining unit selects a predetermined number of detected voice sections in decreasing order of their power or S/N ratio.