I think the bass will go through almost anything, and that is why craft paper or thin plastic is used for bass traps. I have velvet covering my bass traps which are also the soffits.I was researching superchunk bass traps today and came across this.
I am a little confused. I understand the craft paper is intended to reflect high frequencies. But doesn't it effectively 'close' the front of the trap and prevent low frequencies from being absorbed?
Maybe this is why burlap is what I've usually seen as a cover. One more question. If I used something like chicken wire and covered it with ordinary porous gauzy fabric (using pink fluffy insulation inside the trap), do I run the risk of having fiberglass flying around the HT?