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Old 4th July 2009, 05:19 PM   #5911
mige0 is offline mige0  Austria
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Quote:
Originally posted by soongsc
I think you are talking about a dipole or bipole configuration. I am not.

Not exactly - rather there seems to be a mental hurdle involved when it comes to sound filed / wave front simus and subsequently with the concept of "diffraction > reflection > delay > interference"


Look at this:


Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


see what I mean ?



Thanks to Paul Falstad having written this great Ripple Tank applet
http://www.softpedia.com/developer/P...tad-56598.html


Michael

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Old 4th July 2009, 05:58 PM   #5912
mige0 is offline mige0  Austria
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I better should have linked to Paul Falstad's Home Page!

http://www.falstad.com/

and his incredible work

http://www.falstad.com/mathphysics.html

WOW !
Ripple Tank applet only being the tip of the iceberg in visualisation tools he wrote...

Michael

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Old 4th July 2009, 06:11 PM   #5913
mige0 is offline mige0  Austria
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Quote:
Originally posted by mige0



Thanks - thats kind of what I would like to know more about.
.......

The multicell pix seen must be intended for driver stacking IMO, where a plane to plane transition of the wave front is somehow beneficial
........
Michael

http://www.audiotelex.com.au/home/ne...il.asp?nid=154

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Old 4th July 2009, 06:18 PM   #5914
KSTR is offline KSTR  Germany
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Michael,

have you checked out the R&D-Team BEM-tools (free demo-versions available). Those look, to me, better suited to the problem than CARA etc.

http://www.randteam.de/RDTeam/Index.html

- Klaus
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Old 4th July 2009, 06:52 PM   #5915
soongsc is offline soongsc  Taiwan
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Quote:
Originally posted by mige0



Not exactly - rather there seems to be a mental hurdle involved when it comes to sound filed / wave front simus and subsequently with the concept of "diffraction > reflection > delay > interference"


Look at this:


Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


see what I mean ?



Thanks to Paul Falstad having written this great Ripple Tank applet
http://www.softpedia.com/developer/P...tad-56598.html


Michael


Quote:
Originally posted by mige0
I better should have linked to Paul Falstad's Home Page!

http://www.falstad.com/

and his incredible work

http://www.falstad.com/mathphysics.html

WOW !
Ripple Tank applet only being the tip of the iceberg in visualisation tools he wrote...

Michael

Why do you select "fixed edges" option?
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Old 4th July 2009, 07:18 PM   #5916
mige0 is offline mige0  Austria
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Quote:
Originally posted by soongsc




Why do you select "fixed edges" option?

No clue - it was set as default - I'm just the monkey pressing buttons here

Michael
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Old 4th July 2009, 07:22 PM   #5917
mige0 is offline mige0  Austria
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Quote:
Originally posted by KSTR
Michael,

have you checked out the R&D-Team BEM-tools (free demo-versions available). Those look, to me, better suited to the problem than CARA etc.

http://www.randteam.de/RDTeam/Index.html

- Klaus

Thanks Kaus to pointing to this - in fact I received mail today that recommended the same.

Yes, this BEM looks great at a first glace - I'm currently checking out ...
(you already know - such a bunch of pretty buttons to press for me poor monkey )



Michael
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Old 4th July 2009, 08:40 PM   #5918
Pano is offline Pano  United States
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Soongsc - could you be a little more restrained in your large quotes please? Quoting an entire post, especially one on the same page, just leads to clutter. Makes the thread harder to read.

Thanks!
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Old 4th July 2009, 10:27 PM   #5919
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Please do not confuse ripple tank simulations as being represenative of acoustic wave propagation. The ripple tank yields surface wave results (or sgallow water waves). These are not the same as waves propagationg in free space. See for example:

http://en.wikipedia.org/wiki/Shallow_water_equations
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Old 4th July 2009, 10:46 PM   #5920
mige0 is offline mige0  Austria
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Quote:
Originally posted by john k...
Please do not confuse ripple tank simulations as being represenative of acoustic wave propagation.

Thanks John for pointing to that.

Where do you see the main differencies - I mean as a visualisation tool as I used it for acoustic wave front propagation / wave front bending / interference pattern?


Michael
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