Fundamental estimation with HarmonicEstimation function

[Zoé SIGRIST]

Hello

I would like to know how the fundamental frequency can be estimated with HarmonicEstimation function. I understood that the herebelow leads to harmonic estimation only : 

Dim harm = HarmonicEstimation(_CurrentFiltered[0,block_length], HARMONIC_COMPONENTS, HARMONIC_AUTO, 60, 40)

the first data of ‘harm’ is the first harmonic and not the fundamental. Is it right?

I want to estimate the Individual harmonic distortion.

thanks

[Bernhard Kantz]

In general, the first component is at the fundamental frequency. But if the number of components is chosen to high (or the db threshold too low) noise can produce a peak at a lower frequency.

Since small changes in the parameters can affect the outcome, I would advise to use the Analysis Wizard for Harmonic Estimation. Here one can easily change settings with a direct feedback on the results. Some background information is also available in the Online Help in the section Tutorials > Data Analysis > Harmonic Estimation Tutorial. The analysis object created can be changed into a formula and used as a starting point.

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