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Interesting, Ulf.

If your horn runs up-to 500-700Hz (somewhere like mine) then what kind “beaming” you meant? Frankly speaking I did not detect any beaming at those frequencies, quite in contrary – it is very difficult to make anything to beam at under 500Hz (unless you have a very large room). Perhaps we are talking about the different things? In term of sound – could describe what you feel is going on with sound when you feel the beaming kicks in? Is it a change of radiation pattern of actually the beaming?

Regarding the pictures – it is very simple and you can inject them into your post, hosting them on my server. On my home pate, on the left menu should be an entry: Announcements. It will have an article describing how to inset images into posts.

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