Patent ID: 8223978

Claim:
A target sound analysis apparatus that analyzes whether or not an evaluation sound contains a target sound, said target sound analysis apparatus comprising: a target sound preparation unit operable to prepare the target sound that is an analysis waveform to be used for analyzing a fundamental period; an evaluation sound preparation unit operable to prepare the evaluation sound that is a to-be-analyzed waveform in which a fundamental period is to be analyzed; and an analysis unit operable to (i) sequentially calculate differential values between the evaluation sound and the target sound at corresponding points in time, by temporally shifting the target sound with respect to the evaluation sound, (ii) calculate an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judge whether or not the target sound exists in the evaluation sound, based on a period of the iterative interval and the fundamental period of the target sound.