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- From: st_waldman@zodiac.dsto.oz.au
- Newsgroups: comp.dsp
- Subject: Frequency-domain curve-fitter wanted
- Message-ID: <1992Sep8.083231.1@zodiac.dsto.oz.au>
- Date: 7 Sep 92 21:32:31 GMT
- Organization: D.S.T.O. Aeronautical Research Laboratory
- Lines: 34
- Nntp-Posting-Host: zodiac.dsto.gov.au
-
- 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
- -----------------------------------------------------------------------
-