1. A sound capture apparatus that suppresses a noise contained in a captured audio signal captured from a sound capture unit, and outputs a target sound, comprising: an estimation unit configured to estimate a noise signal from the captured audio signal captured from the sound capture unit; a detection unit configured to detect whether an estimated noise signal estimated by the estimation unit is in a noiseless state; and a learning unit configured to, if the detection unit detects that the estimated noise signal is in the noiseless state, analyze the captured audio signal as a target sound signal, and learn and model a characteristic obtained by the analysis, thereby generating a target sound model.