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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
vinylfan62
119 posts
 
Geoffkait I would like to understand the bowl resonator you mentioned. I don’t mean to derail this discussion but if you could post a link to what you refer to I would investigate further. Are they examples I can research? Thanks-
mike. 
geoffkait's avatar
geoffkait
23,365 posts
 
You can research the original Franck Tchang Acoustic Resonators. Here is one of the excellent reviews in 6 Moons,

https://6moons.com/audioreviews/francktchang/resonators_2.html
theaudiotweak
2,769 posts
 
Not mentioned in the review or in the patent disclosure is how shear energy and material velocity only in solids is what  reforms compressive waves and actually makes for the differences we hear when various materials and shapes are introduced into an acoustic space. Tom
geoffkait's avatar
geoffkait
23,365 posts
 
Or it could be just the pressure equalization and electromagnetic wave absorption the review discusses. Hel-loo!
theaudiotweak
2,769 posts
 
But its not that..It is the same way shear waves in the earth travel at different velocities and with different polaraties thru different types of rock ..more solid vs dispersed and porous determines the distance from the epi center the waves can be felt. Tom
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