Figuring out hornresp specs

[Droco]

I'm trying to figure out what the hornresp values are for my horn. Its a brand new horn designed by Omholt and Don Keele, but as it will be used in commercial speakers I will not be able to get the specs from them. The horn looks and measures amazing so I'm already very excited, I just hope I can lock down the specs too.

Here are some physical specs:

- throat: 18 x 2cm (a slotport)
- mouth: 108 x 75cm
- depth: 38cm

I tried including as much usefull pictures as I could, but the files were to big so here is a link to the wetransfer link with all the pictures: WeTransfer. Can anyone maybe help identifying what type of segments (conical, exp, etc?) they are?

I think there are 3 segments, conical than exponential/tractrix, then conical again.

Ofcourse tips on how to figure this all out are even more usefull!

 

[freddi]

can't figure it out easily but here are your pictures in a more readable size

 

[AllenB]

I think there are 3 segments, conical than exponential/tractrix, then conical again.

Normally I'd call that Hyp/Ex. This can be effective where you want to ride out the directivity, such as at lower midrange.

It appears to be designed with care. The top/bottom wall roundover is of a larger diameter and hasn't developed to the same angle as the others, given the shorter dimension.

 

[Droco]

Anyone any tip on how to convert the curve into the horn? Just looking for something practical so I can just put it on paper and deduce from that how the curve runs.