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Author Topic: Subwoofer Array Directivity Prediction Software  (Read 2504 times)

Alberto Escrina

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Subwoofer Array Directivity Prediction Software
« on: December 03, 2014, 09:43:15 am »

I´m interested on the analysis of direcivity of subwoofer stacks considering, besides relative phase and amplitud summation, size on each cabinet and X, Y, Z position on space.
I imagine a tool where you could input a near field mesurement of a low frequency box as a starting point and deploy arrays of different sizes and box quantities from there.
The goal is to analize how the constructed "baffle" will alter the lower part of the frequency response, because of its its height and width.
Tried to make simulations with Ease Focus 2, Array Show, Ray End and the one Merlijn van Veen developed, S.A.D, but unless I´m doing something wrong, the results seem they do not include the variable I´m trying to analize.
Pehaps Ease will make it but I don´t have it and I´m not familiar with it.
Any clue?
Thank you.
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Alberto Escriña
R&D for STS Sound Touring Systems
Buenos Aires,
Argentina

Merlijn van Veen

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Re: Subwoofer Array Directivity Prediction Software
« Reply #1 on: December 03, 2014, 11:39:57 am »

Hi Alberto,

What you're looking for is Boundary Element Modeling (BEM) or particle velocity software.

Supposedly this is computationally very intensive and might explain, amongst other reasons, why this method hasn't been introduced in commercial calculators yet.

The subwoofer data in Meyer Sound MAPP Online have been modeled this way AFAIK, but the software itself is still using the point pressure model.

Regards,

one Merlijn van Veen ; )

Alberto Escrina

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Re: Subwoofer Array Directivity Prediction Software
« Reply #2 on: December 03, 2014, 12:03:11 pm »

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Alberto Escriña
R&D for STS Sound Touring Systems
Buenos Aires,
Argentina

Alberto Escrina

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Re: Subwoofer Array Directivity Prediction Software
« Reply #3 on: December 04, 2014, 09:11:03 am »


The subwoofer data in Meyer Sound MAPP Online have been modeled this way AFAIK, but the software itself is still using the point pressure model.

Regards,

one Merlijn van Veen ; )

Hi Merlijn,
Extracted from Meyer site, MAPP angular data is modeled employed BEM for frequencies lower than 100hz because of the LF limitations of their anechoic chamber.
Starting from 100hz and up angular data is measured.
Still waiting for any information on generic BEM software availability.
Best regards,
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Alberto Escriña
R&D for STS Sound Touring Systems
Buenos Aires,
Argentina

Simon Lewis

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ProSoundWeb Community

Re: Subwoofer Array Directivity Prediction Software
« Reply #4 on: December 04, 2014, 05:37:01 pm »


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