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Old 13th October 2009, 12:54 PM   #11
Clarkcr is offline Clarkcr  United States
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Please. No pictures. :-D
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Old 13th October 2009, 01:06 PM   #12
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Show us some pictures, please.
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Old 13th October 2009, 02:47 PM   #13
NV&H is offline NV&H  United States
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Well, I also I glued the corrugated ribbon edgewise on both sides to stretched hose, such that the ribbon was 'normal' to the hose. That worked very well, but there was still some extraneous high frequency stuff. I haven't given up on that concept.

But what gave startling results was when I just flattened the ribbon out and fixed it flat against the stretched hose, like bologne on a piece of bread. Just a little spritz of Super 77.
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Old 13th October 2009, 03:07 PM   #14
T in AZ is offline T in AZ  United States
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I think you may be on to a real discovery, think carbon fibers, or Kevlar

Last edited by T in AZ; 13th October 2009 at 03:10 PM.
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Old 13th October 2009, 03:54 PM   #15
Clarkcr is offline Clarkcr  United States
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I would say the glue probably did half if not most of the work in dampening the resonances. Does the ribbon you built have a resonant frequency? I wonder what it all looks like on an graph.
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Old 13th October 2009, 05:08 PM   #16
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Who's going to start the group buy thread?!
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Old 14th October 2009, 03:45 AM   #17
NV&H is offline NV&H  United States
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Quote:
Originally Posted by Clarkcr View Post
I would say the glue probably did half if not most of the work in dampening the resonances. Does the ribbon you built have a resonant frequency? I wonder what it all looks like on an graph.
I tend to agree. The small amount of glue evenly distributed helps good bit, I'm sure. But the pantyhose has damping properties as well, because of friction where the fibers interconnect. Any movement within the weave, caused by extraneous vibrations within the ribbon, results in energy being scrubbed off.

As for the primary resonance of the ribbon; that just depends on the tension I put on it. When I pull it tight, frequency rolls off below 1khz. With no tension (i.e., no centering force), the resonant frequency is probably close to 0 hz. Afterall, a spring/mass system with a super weak spring gives a super low resonance. With no tension, I can hear rather deep base.
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Old 14th October 2009, 05:24 AM   #18
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Very interesting! If you don't mind, please show us some pictures.

Wachara C.
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Old 14th October 2009, 12:33 PM   #19
Clarkcr is offline Clarkcr  United States
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Yea. Come with the pics. I am tempted to build my own. I want to cry when Alison sings too.
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Old 14th October 2009, 02:21 PM   #20
NV&H is offline NV&H  United States
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Pictures? As you wish.

Check back Sat evening, and I will have posted pictures by then.
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