| 摘要 |
In a method for estimating a noise level expressing the size of a noise component from measurement data, each area of consecutive positive values and area of consecutive negative values in first waveform data obtained by extracting a high-frequency noise component from assumed noise data is made to be a single segment (step S3); a segment width threshold is determined on the basis of the distribution of the widths of the plurality of segments dividing the first waveform data (step S4); second waveform data obtained by extracting a high-frequency measurement component from measurement data is divided into a plurality of segments, with each area of consecutive positive values and area of consecutive negative values in the second waveform data being a single segment (step S6); a first segment group is created through the removal of segments having a width exceeding the threshold from the plurality of segments of the second waveform data (step S7); and a noise level is determined on the basis of the height or area of the plurality of segments included in the first segment group (step S12). |
