Horn Theory article download from AudioXpress

The first article in what appears to be series of articles on horns is available from AudioXpress in the March issue, or on their website as a free download. This month's, Part 1, is all theory. Evidently Part 2 will cover some practical design considerations. I found it quite interesting.

http://www.audioxpress.com/

This might belong in Loudspeakers, but I figured more of you folks would be interested.

pj