(1) for judging whether or not the operation of the object to be detected is an operation in an invariable section, and an invariant section judging section (1) for judging whether or not an operation signal in the invariable section (3) for generating a correction parameter for correcting an observation signal in a time interval other than an invariable section, and a correction parameter generating section (3) for generating a correction parameter for correcting the observation signal in the time interval other than the constant section (4) for extracting a feature amount of an operation sound to be detected in a time interval other than an invariable section based on the observation signal to be detected and the correction parameter, And a joint determination unit (5) for determining whether or not a joint has occurred in the object to be detected.
展开▼
