Collection of the time-series data which utilizes the self regression model and treatment manner

摘要

To constitute a filter adapted to such object part as an unknown sound for such time-series data as sound and vibration. SOLUTION: When processing such time-series data as collected sound and vibration through filters 3 which are constituted by an autoregressive model and a plurality of filters 3 are provided so that each autoregressive coefficient can be set and a POWER spectrum is calculated according to an autoregressive model for a desired part including a significant signal among the collected time-series data. When a calculated POWER spectrum differs from that calculated in the past and an autoregressive coefficient is calculated 4, the coefficient is set to a non-set filter, and at the same time and information ON the POWER spectrum is stored and is compared with POWER spectrum which is calculated later. Since a filter is constituted from the collected time-series data and a corresponding filter can be constituted also for an unknown desired art to identify succeeding same desired part.