7. A voice retrieval method comprising: a storing step of storing recorded voices; an accepting step of accepting a retrieval term; a retrieval step of retrieving, from the recorded voices, a plurality of candidate segments where an utterance of the accepted retrieval term is estimated; a first display control step of displaying a plurality of pieces of candidate identifying information respectively corresponding to the plurality of the candidate segments on a display in an order of likelihood; a first replay step of replaying voices in a candidate segment corresponding to a piece of candidate identifying information that is identified in accordance with a first user operation by which the piece of candidate identifying information is identified from the plurality of pieces of candidate identifying information; a user operation accepting step of accepting a second user operation by which a piece of candidate identifying information is identified from the plurality of the pieces of candidate identifying information after the voices in the candidate segment are replayed; and a second display control step of adding a marking to a portion of display information indicating a time transition of the recorded voices, the portion of the display information corresponding to the piece of the candidate identifying information identified by the second user operation, and displaying the display information with the marking on the display, in accordance with a third user operation.
7. A voice retrieval method comprising: a storing step of storing recorded voices; an accepting step of accepting a retrieval term; a retrieval step of retrieving, from the recorded voices, a plurality of candidate segments where an utterance of the accepted retrieval term is estimated; a first display control step of displaying a plurality of pieces of candidate identifying information respectively corresponding to the plurality of the candidate segments on a display in an order of likelihood; a first replay step of replaying voices in a candidate segment corresponding to a piece of candidate identifying information that is identified in accordance with a first user operation by which the piece of candidate identifying information is identified from the plurality of pieces of candidate identifying information; a user operation accepting step of accepting a second user operation by which a piece of candidate identifying information is identified from the plurality of the pieces of candidate identifying information after the voices in the candidate segment are replayed; and a second display control step of adding a marking to a portion of display information indicating a time transition of the recorded voices, the portion of the display information corresponding to the piece of the candidate identifying information identified by the second user operation, and displaying the display information with the marking on the display, in accordance with a third user operation. 8. The voice retrieval method according to claim 7 , further comprising a fourth display control step of adding text of the retrieval term to the marking.