In the first article about the original Kalrson tube, I was able to develop the BEM models and investigate the acoustic properties of this special type of horn/waveguide. I made no secret of the fact that I particularly disliked the directivity control. A few days ago, I had an exciting idea about how to modify the Karlson tube to achieve better results. The implementation wasn’t that complicated, and in the end I was quite surprised at how good the results were.

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