Translations:Prewhitening - book/3/en

As an alternative to tapering, the truncated autocorrelation shown in Figure 10b can have its zero-lag value boosted. Such boosting is called prewhitening. Figure 10d shows that 50% prewhitening (that is, increasing the zero-lag value by 50%) makes the spectrum positive for nearly all frequencies. The present case represents an extreme. In actual seismic processing, the use of 0.1% to 5% prewhitening is usually enough.