Frequency-domain curve-fitter wanted

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1 total messages Started by st_waldman Mon, 07 Sep 1992 21:32

#652

Author: st_waldman
Date: Mon, 07 Sep 1992 21:32

34 lines
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Hi,

I am interested in curve-fitting sound pressure and impedance
response functions in the frequency domain using a rational
fraction polynomial formulation. Does anyone have any source
code to such a routine in Fortran, Pascal, or C?.

I have seen a paper titled "A Frequency Domain Curve Fitting
Algorithm With Improved Accuracy", by Jim Adcock (Hewlett-
Packard) and Ron Potter (Consultant) that was presented at a
modal analysis convention a few years ago.

The above algorithm can fit to data that is log-spaced in the
frequency domain, which is the common form for audio/acoustic
measurements as published in loudspeaker manufacturers data
sheets.

My application is related to modelling of loudspeaker systems so
that it will be possible to design crossover networks that take
into account each driver's natural response characteristics.

Any suggestions or pointers where I could obtain program source
code that implements this algorithm will be gratefully received.

Maybe even someone from Hewlett-Packard can help me?

Thank you.

-----------------------------------------------------------------------
 Witold Waldman
 Aeronautical Research Laboratory   Internet: witold@hotblk.dsto.gov.au
 Melbourne                          Fax     : +61 3 646 7771
 Australia                          Tel     : +61 3 647 7488
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