Thanks for the graph it is very useful, I suspect that your speaker
fell apart from 8,000 to 20,000 cycles. Right?
Rich
--- In Klas Strandberg <>
wrote:
>
> if you don't know.... there is a picture at
> http://www.telinga.com/gallery/picture_gallery4.htm
>
> Observe the difference between the omni and the cardioid.
> Also observe the shadowed +/-3db "average" frequency response of the
> inwards facing cardioid: You can see roughly 25db (!!) between 300
Hz and
> 10 kHz.
>
> Klas.
>
> At 15:17 2006-10-02, you wrote:
> >--- In "John Hartog" wrote:
> >
> > > Thanks for your perspective. If it's not too much trouble, please
> > > email me the Sten Wahlstrom pdf =AD whenever you get the chance.
> >
> >I checked out this article when Mr. Knapp mentioned it some time ago.
> > It is available at most large university technical libraries for the
> >cost of a photocopy:
> >
> >"The Parabolic Reflector as an Acoustical Amplifier", JAES Volume 33
> >Number 6 pp. 418-429; June 1985
> >
> >Highly recommended! If you aren't up to the math, you can just ignore
> >most of it (the hardcore stuff is at the back anyways) and simply
> >absorb the results.
> >
> > > http://home.att.net/~rsl/APPR1.htm
> >
> >This is not as comprehensive, or useful, as the Wahlstrom paper.
> >
> >If there is a PDF file of Wahlstrom's analysis, copyright should be
> >figured out and it ought to be hosted somewhere. Telinga ought to
> >include it with their products as a kind of technical appendix.
> >
> >
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>
> Telinga Microphones, Botarbo,
> S-748 96 Tobo, Sweden.
> Phone & fax int + 295 310 01
> email:
> website: www.telinga.com
>
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