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by Marcel Batík
"Advanced Transition Horns" (ATH) are acoustic horns and waveguides created utilizing formulas described in the following papers.
These novel formulas combine a controlled-directivity approach of Dr. Earl Geddes (OS waveguide) with an all-smooth horn-to-free-air transition,
providing a modern, high-performance blend for quality sound reproduction.
Papers on horns:
OS-SE Waveguide (pdf) / baffle mounted
R-OSSE Acoustic Waveguide (pdf) / free standing
Spherical Wave Forming (pdf)
Interactive formulas in Desmos calculator:
Associated diyAudio threads:
Theory & Design |
Sample waveguide ST260
ATH software is no longer maintained.
The last released package:
Ath 4.8.2 with a
User Guide; the latest beta-build.
The latest web update: August 27, 2023
If interested, please contact the author via e-mail
or the diyAudio thread.