Holes in braces?

screamersusa · 29th December 2008, 01:13 AM

If one is tapering the central brace on a tapped horn or folded horn, once you run out of taper...
How will holes in the remaining straight brace section affect the horn? Should the area the brace with holes occupies be counted toward your overall horn cross section in that area of the horn?
Thanks

JLH · 29th December 2008, 12:12 PM

I always account for the loss in cross sectional area due to bracing. By skeletonizing or putting holes in the braces, you can gain some cross sectional area. It is pretty easy to calculate how much area you’ll gain. While I’ve never used this method to continue an expansion rate, I don’t see a problem with it. Area is area; I don’t think the tapped horn will care. You just need to watch out for any frequency abnormalities that may pop up.

Rgs, JLH

screamersusa · 29th December 2008, 02:12 PM

Thanks.

The problem is I'm just shy of box width at the end of my taper for the rear brace and I'm hoping to continue the last part with a 3/4 thick skeleton brace. I'm also hoping the holes will help break up that part of the parallel outer wall section.

29th December 2008, 01:13 AM	#1
screamersusa diyAudio Member Join Date: Jun 2005 Location: Florida	Holes in braces? If one is tapering the central brace on a tapped horn or folded horn, once you run out of taper... How will holes in the remaining straight brace section affect the horn? Should the area the brace with holes occupies be counted toward your overall horn cross section in that area of the horn? Thanks

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29th December 2008, 12:12 PM	#2
JLH diyAudio Member Join Date: Apr 2005 Location: Indianapolis, IN	I always account for the loss in cross sectional area due to bracing. By skeletonizing or putting holes in the braces, you can gain some cross sectional area. It is pretty easy to calculate how much area you’ll gain. While I’ve never used this method to continue an expansion rate, I don’t see a problem with it. Area is area; I don’t think the tapped horn will care. You just need to watch out for any frequency abnormalities that may pop up. Rgs, JLH

29th December 2008, 02:12 PM	#3
screamersusa diyAudio Member Join Date: Jun 2005 Location: Florida	Thanks. The problem is I'm just shy of box width at the end of my taper for the rear brace and I'm hoping to continue the last part with a 3/4 thick skeleton brace. I'm also hoping the holes will help break up that part of the parallel outer wall section.

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