Repeat for a third interval between 36 and 40kHz with increments of 200Hz.
The choice of intervals is dictated by the user's knowledge of the system and desired objectives of the analysis. Here, we use intervals 2 and 3 to obtain a smoother admittance plot around the electrical resonance and antiresonance of the transducer.
The frequency intervals are automatically combined and sorted. The list of frequencies that will be used for the harmonic computation is:
25000, 26000, 27000, 28000, 29000, 30000, 31000, 32000, 32100, 32200, 32300, 32400, 32500, 32600, 32700, 32800, 32900, 33000, 33100, 33200, 33300, 33400, 33500, 33600, 33700, 33800, 33900, 34000, 35000, 36000, 36200, 36400, 36600, 36800, 37000, 37200, 37400, 37600, 37800, 38000, 38200, 38400, 38600, 38800, 39000, 39200, 39400, 39600, 39800, 40000, 41000, 42000, 43000, 44000, 45000, 46000, 47000, 48000, 49000, 50000, 51000, 52000, 53000, 54000, 55000
Note that the three lists, composed of 31, 21 and 21 frequencies, add up to one final list of 65 frequencies instead of 73. This is because duplicate frequencies are automatically removed from the final frequency list.

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