On 26 Sep 2001 21:28:33 -0400, Kasm Consulting wrote:
> Jan,
>
> No offense taken at all.
> I'am aware of the Qc,Qt,Fs figures.
> The optimum way to get these figures for a given
> speaker pair (For Matching) would be to take an
> actual impedance reading over a range of freqs and then
> calculate from the graph produced. There is quite a bit
> of variance amoung speakers, even if the same model.
>

Not that this particularly my field (he hides behind his CS academia!)
but the way a colleague and I have done this in the past is to use an
impulse noise spike (a maximum length sequence) and then capture this
(with a calibrated mic) and do the FFT...

We have an old bit of kit called the "IMP" which plugs into a PC
parallel port which does all the noise/capture and then you can do your
own thing and get all the Q's and impedance curves and response curves
too...

Just my $0.02
/Kevin
--
Kevin J. Maciunas           Net: kevin@cs.adelaide.edu.au
Dept. of Computer Science   Ph : +61 8 8303 5845
University of Adelaide      Fax: +61 8 8303 4366
Adelaide 5005               http://www.cs.adelaide.edu.au/~kevin
SOUTH AUSTRALIA

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