# Klauder filter

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A common type of synthetic wavelet in reflection seismology. It is zero-phase, and symmetrical about time *t* = 0 ms.

The Klauder wavelet 'represents the autocorrelation of a linearly swept frequency-modulated sinuusoidal signal used in Vibroseis' (Ryan 1994). It is defined by its lower frequency *f*_{lower} (perhaps 2–8 Hz), its upper frequency *f*_{upper} (often about 100–200 Hz), and its duration *T*, commonly about 6–12 s.

where *k* is the rate of change of frequency with time:

and *f*_{0} is the mid-frequency of the bandwidth:

Klauder-filtered wavelets have several sidelobes, unlike Ricker wavelets which only have two, one either side.

## See also

## References

- Ryan, 1994. A choice of wavelets. CSEG Recorder September 1994.

## External links

- Klauder wavelet — Sheriff's Encyclopedic Dictionary

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