Hornresp

[Bluewoldemort]

Ok so I made BP6, TH and PH3 as close as I could without decimals.
BP6:

PH3:

TH with a rear chamber as the stub and throat adapter and port as the rear chamber:

So TH and PH3 look pretty similar and both have a tuning around 26/58, but BP6 still has a lower tune of about 24/51Hz, and all of them are 316l +-0.5l.
So it must be the stub between the cone and front chamber that raises the tuning because it is simulated in both TH and PH3, but not BP6.

 

[Bluewoldemort]

Also I found a graphical bug in at least the PH and TH models. Not sure if this is known
When you change e.g. the L12 value it copies the graphical value of S2 to S2S and S4 to S4S, as seen on the S2S slider:

 

[BP1Fanatic]

The BP6S function doesn't open up the bottom fields to add a stub.

 

[BP1Fanatic]

That sounds right since you started with the Stepped function (red segments) on the home screen of the TH and Paraflex.

 

[David McBean]

I found a graphical bug in at least the PH and TH models.

Thanks for mentioning this. It will be fixed in the next update.

 

[David McBean]

So TH and PH3 look pretty similar and both have a tuning around 26/58, but BP6 still has a lower tune of about 24/51Hz, and all of them are 316l +-0.5l.

The attached PH1, PH3, BP6S and TH designs all have the same 27.2 Hz fundamental frequency. I will leave it to you to work out why .

(The port tube lengths in the BP6S design have been shortened to take into account the automatically-added end corrections).

 

[David McBean]

E.g. with a PH1 model, why does it say this is s5, s6 and s7

It is not saying S5, S6 and S7 (cross-sectional areas), it is saying Segment 5, Segment 6 and Segment 7.

Segments 5, 6 and 7 are shown as H5, H6 and H7 on the system model diagram:

 

[BP1Fanatic]

The attached PH1, PH3, BP6S and TH designs all have the same 27.2 Hz fundamental frequency. I will leave it to you to work out why .

(The port tube lengths in the BP6S design have been shortened to take into account the automatically-added end corrections).

I'm on my phone, do the 4 enclosures have the same total volume with the shorten port tubes?

 

[BP1Fanatic]

In post #14,617, PAR segments were used for the PH1 model and CON segments were used for the PH3 model.

You physically build a PAR enclosure even though the models have ZERO FLARE segments.

 

[Bluewoldemort]

(The port tube lengths in the BP6S design have been shortened to take into account the automatically-added end corrections).

Ok thanks.
So this is at least a meaningful difference. What sort of end corrections are being applied and how would they look like IRL?
Are there no end corrections in the horn models or?

 

[Bluewoldemort]

I'm on my phone, do the 4 enclosures have the same total volume with the shorten port tubes?

The horns had the same total volumes and the BP6s had about 10l less, because the ports were shorter to account for end correction, which is not accounted for in the total volume, I presume.

In post #14,617, PAR segments were used for the PH1 model and CON segments were used for the PH3 model.

I see, I've been playing around with a bunch of things and done some misclicks, but it shouldn't matter as the sections are straight.