7. The interactive robot according to claim 1 , wherein the target voices are voices produced by an interlocutor communicating with the interactive robot, and the interactive robot further comprises an image acquiring unit that acquires images including the interlocutor as the sound source of the target voices; and a mouth-movement detecting unit that detects, from the images, mouth movement caused by voices produced by the interlocutor, wherein the moving unit moves the interactive robot itself in the direction of the sound source when the recognition-accuracy is equal to or larger than the threshold for the recognition accuracy, and the mouth movement of the interlocutor is not detected.
1. An interactive robot capable of speech recognition, comprising: a sound-source-direction estimating unit that estimates a direction of a sound source for target voices which are required to undergo speech recognition; a moving unit that moves the interactive robot in the sound-source direction; a target-voice acquiring unit that acquires the target voices at a position after moving; a target-voice holding unit that holds voice patterns of the target voices, the target voices including misrecognition-notification voices signifying that speech recognition by the speech recognizing unit is erroneous; a speech recognizing unit that performs speech recognition of the target voices by pattern matching of the voice patterns of the target voices, which are held in the target-voice holding unit, with the target voices acquired by the target-voice acquiring unit; a recognition-accuracy evaluating unit that calculates, as an accuracy of recognition results, an agreement accuracy between the acquired target voices and the voice patterns of the target voices held in the target-voice holding unit; wherein the moving unit moves the interactive robot itself in the direction of the sound source when the recognition accuracy for results of speech recognition of the target voices is smaller than a predetermined recognition-accuracy threshold and when the misrecognition-notification voices held in the target-voice holding unit are recognized.