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Class: TFastFourier
Declaration: function RMS (FirstIx, LastIx: integer): double;

The function RMS returns the root mean square for all frequencies in the interval [FirstIx..LastIx ]. RMS is the square root of the sum of all lines of the power spectrum in the specified interval. The indices FirstIx and LastIx may assume values between 0 and SpectrumSize div 2. Accessing any value of the array below 0 and above SpectrumSize div 2 will result in a zero value.

Last Update: 2012-Okt-20