Making acoustic panels with denim vs fiberglass

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timind

Making acoustic panels with denim vs fiberglass
« on: 16 Jul 2017, 05:16 pm »
My daughter has purchased a couple of frozen meals from a company called Freshly. The meals come packed with those ice packs and insulated with cotton batting. I was going to discard the insulation until I removed it from the plastic and thought, hmmm.

The pieces are 36x16x2 and I thought maybe they would make decent absorption panels if I built a frame and wrapped them in fabric. I could, and probably would double the thickness on the panels. Any thoughts on this?


mikeeastman

Re: Making acoustic panels with denim vs fiberglass
« Reply #1 on: 16 Jul 2017, 05:23 pm »
When I made up my panel I used "Ultra Touch" insulation, which looks just like what you have pictured. Its nicer than fiberglass to work with and is supposedly slightly better acoustically.

timind

Re: Making acoustic panels with denim vs fiberglass
« Reply #2 on: 16 Jul 2017, 05:26 pm »
Trying to get a pic that won't blow up the page. :(

poseidonsvoice

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timind

Re: Making acoustic panels with denim vs fiberglass
« Reply #4 on: 16 Jul 2017, 06:31 pm »
Perhaps relevant:

https://www.gearslutz.com/board/studio-building-acoustics/937978-ultratouch-denim-insulation-superior-bass-buster.html

Best,
Anand.

That was an intense thread without a real conclusion from my reading.

I'll build a couple 4" thick panels and listen.

JLM

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Re: Making acoustic panels with denim vs fiberglass
« Reply #5 on: 17 Jul 2017, 01:40 pm »
Try to look up the acoustical properties of said material.  Most look better than they perform.  Open cell foam or egg cartons are a sick joke.  Search for wide band acoustic absorption.  One of the best is Owens Corning 703 high density fiberglass (used by GIK, one of the sponsors here at Audio Circle).  Their thinner (2 inches of fiberglass) panels are rated for midrange/treble frequencies, but the thicker ones (4 inches of fiberglass) also cover the mid-bass range.

poseidonsvoice

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Re: Making acoustic panels with denim vs fiberglass
« Reply #6 on: 17 Jul 2017, 02:10 pm »
That was an intense thread without a real conclusion from my reading.

I'll build a couple 4" thick panels and listen.

JLM is right. I thought the NRC and acoustical properties were listed in my previous link but maybe not.

Best,
Anand.

richidoo

Re: Making acoustic panels with denim vs fiberglass
« Reply #7 on: 17 Jul 2017, 02:51 pm »
I've been using denim batt for years for acoustic damping. It is a very powerful sound absorber, non-toxic, and no itch. Not easy to cut though and it sheds dust. Better than yellow FG panels, ime.

Armaegis

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Re: Making acoustic panels with denim vs fiberglass
« Reply #8 on: 17 Jul 2017, 03:15 pm »
The guy from Silent PC Review also built an anechoic chamber with ultrafill:
http://www.silentpcreview.com/article876-page8.html