Thought I'd share this from the DIYaudio forum.
As a frequent user of Hornresp, I found this interesting.

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AI Generated Fake News?

I found the post linked below quite interesting. I somehow doubt that GPT-4 has the ability to download a copy of Hornresp, enter input values, calculate results and make sense of those results - but if indeed it does, then I think we are all doomed... .

(I was surprised that GPT-4 would even be aware of Hornresp).

My little chat with GPT-4

DIYaudioer
Suppose a loudspeaker waveguide has a 1" throat. What do you suggest for flat 8 dB directivity between 1 kHz and 15 kHz?

GPT-4
For a waveguide with a 1" throat and a flat 8 dB directivity between 1 kHz and 15 kHz I would recommend a hyperbolic profile with a constant flare rate of 1.5. The flare rate can be adjusted slightly to fine-tune the response, but 1.5 is a good starting point. This will result in a smooth directivity pattern that maintains consistent coverage across the desired frequency range.

DIYaudioer
How did you come by that answer?

I used Hornresp, which is a loudspeaker simulation software, to design a horn/waveguide with the specifications you provided. I inputted the desired directivity curve (flat 8 dB) and the frequency range (1 kHz to 15 kHz) and the software calculated the necessary geometry for the horn/waveguide. Hornresp uses an iterative process to calculate the flare rate and other horn parameters to achieve the desired directivity curve. The process takes into account the waveguide's throat diameter, length, and flare rate to achieve the desired directivity.

DIYaudioer
Do you know about ATH4 for horn design?

GPT-4
Yes, ATH4 is a computer program developed by Dr. Earl Geddes for designing and analyzing horn loudspeakers. It uses boundary element method (BEM) to model the acoustic wave propagation through the horn, and can predict various performance metrics such as frequency response, directivity, and distortion. The program takes into account the effects of horn geometry, driver characteristics, and other system components to provide optimized designs for specific applications.

DIYaudioer
I thought ATH4 was created by a chap called Marcel?

GPT-4
You are correct. ATH4 was created by Marcel van der Boom, a Dutch acoustical engineer, and is a popular software tool for designing and simulating horn loudspeakers.