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Old Yesterday, 07:24 AM   #7951
David McBean is offline David McBean  Australia
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Hi Cubana,

Quote:
Originally Posted by Cubana View Post
Here's what I got:
Looks good to me :-).

Quote:
Originally Posted by Cubana View Post
David, would you like to add Measurements for the car?
Measured "room gain" data for the car interior can be imported into Hornresp, and automatically taken into account when calculating the power response.

Ang = 0.5 x Pi is normally assumed when simulating bass loudspeakers in cars.

Kind regards,

David
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Old Yesterday, 07:50 AM   #7952
David McBean is offline David McBean  Australia
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Hi Rick,

Quote:
Originally Posted by rickmcinnis View Post
Playing around with hornresp, which is lots of fun, my idea of a video game.

I know it is not the answer but it sure teaches you how things work. To learn the trends of what happens when one changes parameters has been a great help to me.
Your comments have made my day - thanks :-).

(From the very beginning I was keen for Hornresp to be not only a simulator but also a learning tool, which hopefully people would find fun to use).

Quote:
Originally Posted by rickmcinnis View Post
Being basically a lazy man I like the simplicity of a three sided conical.

So what are the problems? Since I can find no one who has written about this I figure there must be a fundamental flaw.
The following thread discusses three-sided conical horns:

Round Conical vs. Triangular Conical "HornGuide"?

Kind regards,

David
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Old Yesterday, 08:02 AM   #7953
Etocynned is offline Etocynned
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So im modeling enclosures for mobile use. When i do do i set the. Ang to 2.0pi and add the transfer function? Or at .5pi and add transfer function?
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Old Yesterday, 08:41 AM   #7954
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by Etocynned View Post
So im modeling enclosures for mobile use. When i do do i set the. Ang to 2.0pi and add the transfer function? Or at .5pi and add transfer function?
Hi Etocynned,

For most vehicle installations it would seem safe to assume a "corner location" for the bass loudspeaker. In such cases the measured cabin gain should be added to the calculated Ang = 0.5 x Pi response.

You may find the following link of interest: Car Audio Cabin Gain Transfer Function

Kind regards,

David
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Last edited by David McBean; Yesterday at 08:43 AM.
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Old Yesterday, 02:12 PM   #7955
rickmcinnis is offline rickmcinnis  United States
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Thanks, Mr. McBean,

I was hoping that would have been more useful.

I see no need for a round throat since I am using a woofer and not a compression driver. Seems most of the responses on that thread were concerned with compression drivers. I use a big round horn for my compression driver, too.

Any further thoughts?

So I guess I must ask: do you think this could have any merit or is a waste of time?
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Old Today, 08:42 AM   #7956
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by rickmcinnis View Post
do you think this could have any merit or is a waste of time?
Hi Rick,

An exponential horn of equivalent size is likely to have a better low-frequency performance than a conical horn, due to the more favourable acoustical impedance loading conditions at the throat. Also, the directivity characteristics of a three-sided horn (exponential or conical) could be rather "unpredictable", I suspect.

Are you perhaps in a position to construct a "quick and dirty" prototype, to see how it performs? It would be a good learning experience, either way :-).

There don't appear to be too many three-sided conical horns around the place though, which probably tells us something about the design...

Kind regards,

David
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Last edited by David McBean; Today at 08:45 AM.
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Old Today, 01:17 PM   #7957
mwmkravchenko is offline mwmkravchenko  Canada
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@ Rick

If you are really interested get yourself some cardboard and make one up. It is easy to cut and fold and will work for a prototype.

My suspicion is that the three sided conical will be rather disappointing compared to a proper exponential. The exponential can be foursided and still be a great performer.
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Old Today, 03:54 PM   #7958
BP1Fanatic is offline BP1Fanatic  United States
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Hey Rick,

Check out the foam core thread for your experiment. X is great at modeling with Akabak and building foam core enclosures. I think he built a couple of cardboard enclosures too.
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