Yeah.
frequency. And another  another algorithm I have is the  in the  instantaneous frequency , based on  on  on the FFT to  to  to calculate the  the phase derivate in the time. Eh , uh n the d I mean I  I have two  two algorithms.
Right.
But , eh , in m  i in my opinion the  the  the instantaneous frequency , the  the  the behavior , eh , was  th it was very interesting. Because I  I saw  eh , how the spectrum  concentrate , eh ,