There was a download of AJHorn 6.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The program's installer files are generally known as AJHorn.exe or AJHorn7.exe etc. The program lies within Education Tools, more precisely Science Tools. This program is a product of AJ-Systems. The most popular versions of the tool 6.0 and 5.0.
From the developer:
AJHorn is a calculation program for horn loudspeakers, transmission lines, and special cases of this type. It can simulate Frontloaded Horns, Rearloaded Horns, Transmissionlines with Front Chamber, Bandpass-Horns, and other variants. It can output various parameters such as frequency responses (of impedance, sound pressure, electrical power, unified acoustic radiation impedance), and radius / area / height / radius of opening function.
You may want to check out more software, such as Panel, gitoolbox or roboBASIC, which might be related to AJHorn.