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In the Forum: Horn-Loaded Speakers
In the Thread: Practicality of paper mache horns.
Post Subject: It seems it felt rightPosted by Gargoyle on: 12/30/2015
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 Paul S wrote:
You might also want to try stiffened felt, which seemed to work "as well" as the paper for me, and it is easier to form. Just saturate the pre-shaped felt with runny "paste", whether gluten/starch or methyl cellulose, milk glue, etc. Spray starch "works", but it's expensive. I also used chicken wire or wood ribs, some stitched to the fabric; anyway, the forms need not be solid. If you think it through ahead of time you can attach the felt to pre-fabricated mounting plates or blocks as you incorporate the fixative. If you have not yet checked out the Jessie Dazzle Project on this forum, do that, too.

Best regards,
Paul S


Thanks for the input. I have perused some of Dazzle's but will have to revisit that topic specifically.

I do not yet have a vacuum pump, researching that at the moment, but in the meantime I though if I wanted to make some little samples of material I was thinking I could weight them down to the tune of ~14.7 psi by using 5 gallons of water on a ~3" squared sample.
It might not be quite the same thing as a vacuum, but its a start.
Ideally I would make long strips of sample material so I can compare how it resonates on the edge of a table, similar to flapping a ruler in school.

Hey Paul S while I have your attention, feel free to recommend a configuration to use for testing. Perhaps something similar to the 200Hz exponential in the video I posted in the thread about surface textures?  For now I just wanted to focus on materials and construction, any contributions with regard to horn theory would lighten my work load. https://www.youtube.com/watch?v=ecVXEFb0mXY

Ultimately it would be nice if the setup could be used in my future horn build, but I realize that my build should orbit around the lower frequency horn.

So that being said, we just need something somewhat decent for experimenting purposes, using something available and cheap like the Faital 5" in the video would be suited for these tests?




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