METHOD FOR DETECTING ABNORMAL SOUND AND METHOD FOR JUDGING ABNORMALITY IN STRUCTURE BY USE OF DETECTED VALUE THEREOF, AND METHOD FOR DETECTING SIMILARITY BETWEEN OSCILLATION WAVESAND METHOD FOR RECOGNIZING VOICE BY USE OF DETECTED VALUE THEREOF

摘要

The present invention provides a method for obtaining an accurate detected value of a similarity, such as an hitting sound. The method includes the steps of : creating original standard/input pattern vectors each having a feature quantity of an hitting sound; creating a skewness-weighting vector and a kurtosis-weighting vector based on a reference pattern vector of a reference shape; calculating a skewness-weighted standard pattern vector and a kurtosis-weighted standard pattern vector by product-sum operation using component values of the skewness-weighting vector and the kurtosis-weighting vector and a component value of the original standard pattern vector; creating a dual and weighted standard pattern vector based on these vectors and similarly creating a dual and weighted input pattern vector; creating dual and selected standard/input pattern vectors based on the dual and weighted standard/input pattern vectors; and setting an angle between the dual and selected standard and input pattern vectors as a geometric distance value between the original standard and input pattern vectors .