Acoustic treatment


I want to build my own bass traps and was wondering if there are any other alternatives to fiberglass and rokwool. Foam is not a consideration as I don't believe it has the necessary qualities for absorption. I have heard of cotton batting, does anyone have experience with this material. The idea of fiberglass makes me itch just thinking about it, but I'm resigned to using it or rokwool if that's all I have.  Please make suggestions and let me know your experiences.

Thanks
Mike
zardozmike
Oh and geoffkait, I am a physician and we are notoriously bad at math but you keep avoiding the question which means to the rest of us that you have no idea what you are talking about.
My experience with tube traps under the most scientific conditions I could create is not good  and I do not intend on going down that road again. I see it as a waste of money. There are better ways to deal with room acoustics
I’m filing your post under Whatever, Doc. And I have no idea what question it is I didn’t answered but I actually don’t care as the subject for today’s class is tiny little bowl resonators, not Tube Traps. Are physicians notoriously bad at staying on the subject? The last thing I mentioned on the subject of Tube Traps was most likely how difficult they are to set up, anyway. I have no idea what problems you had with Tube Traps. Most people don’t.
With regard to the OP's question, I understand that Rockboard 60 is highly regarded. I didn't try it because the minimum order in my neck of the woods was a pallet.