PRELIMINARY REPORT ON A SINGLE-CHANNEL STATISTICAL TECHNIQUE FOR SUPPRESSING LONG-PERIOD MICROSEISMIC NOISE.
Abstract
The probability distribution of the sample power of long-period microseismic noise at any frequency can be represented as that of a scaled chi-square variable. A computer program has been written which estimates the upper 90 percent probability limit on this distribution for a series of discrete frequencies representing the long-period spectrum, from a set of sequential samples of the noise. Subtraction of these upper 90 percent limits from the spectra of subsequent data samples results in a substantial improvement in the time-domain signal-to-noise ratios of any transient Rayleigh wave signals in the subsequent samples. Examples demonstrating the effectiveness of the technique are presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1968
- Accession Number
- AD0840709
Entities
People
- H. S. Travis
- Richard S. Simons
- William R. Weber
Organizations
- Geotech Instruments (United States)