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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