The Hilbert transformation > Hilbert transform and instantaneous frequency

An amplitude spectrum gives the frequency content of the seismic signals which are recorded by the sensors ( geophone or hydrophone). It is a global measurement. In order to evaluate the frequency content variation versus the propagation time, it is useful to perform time – frequency analysis. Several methods can be used. The instantaneous frequency computed from Hilbert transform is a method , easy to implement, which very often used.