Four frequency components are input into a port of a first demultiplexing filter circuit, and demultiplexed into low frequency components and high frequency components, and input in a port of a second demultiplexing filter circuit and a port of a third demultiplexing filter circuit, respectively. The thinning edge is provided such that a rake angle that is an angle formed by the thinning edge and the axis of the body and that is located nearer the axis of the body is different from one that is located nearer the cutting edge, and at the same time, the rake angle of the thinning edge nearer the cutting edge is set at a positive angle larger than that nearer the axis of the body. The ID may be stored in at least one transactional type lock object. In situ analysis and time-lapse logging are also enabled.