Target sound analysis apparatus, target sound analysis method and target sound analysis program

A target sound analysis method of analyzing whether or not an evaluation sound contains a target sound, said target sound analysis method comprising steps of:

• preparing a target sound that is an analysis waveform to be used for analyzing a fundamental period;
• preparing an evaluation sound that is a to-be-analyzed waveform in which the fundamental period is to be analyzed;
• and
• (i) sequentially calculating 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) calculating an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judging 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.

A program that analyzes whether or not an evaluation sound contains a target sound, said program causing a computer to execute steps of:

• preparing a target sound that is an analysis waveform to be used for analyzing a fundamental period;
• preparing an evaluation sound that is a to-be-analyzed waveform in which the fundamental period is to be analyzed;
• and
• (i) sequentially calculating 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) calculating an iterative interval between the points in time where the differential value is equal to or lower than a predetermined threshold value, and (iii) judging 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.