Sand Bag or bean bag?

Hello All, I live in Pompano Beach, Florida US. I have been burning my brain on all the info here and just when I think I figured it out, I find another post that takes me off in another direction. I am in a small apartment bedroom ( how many times have you heard that before?) and in these bleak financial times I am forced to deal with my situation. Neighbors at peace or me out. So I am building an isolation booth for me to produce in (electronic music) with terribly small dimensions(L=6'4" W=5'10" H=6'8") I know I am in mode hell and all sorts of other acoustic nightmares are mine to explore. But I have to make the best of it. I am taking my time due to the inconsistent flow of resources. My question is junkyard tactics. For bass absorption, I was contemplating sand bags in the corners or bean bag chairs behind chicken wire to fill out the space that is usually taken up by the fiber board . I searched the site and found no reference to these items. Also, If the sand is the better of the two, then would a heavy duty garbage to contain the sand interfere with the sound in any negative way? Also, I have seen small studios on this site, but never any this small. If you know of any links of someone who has been down this road before I would appreciate it. I know that low frequency is my battle. I plan to put as many angles in the room as I can. Thank you. :yahoo:

For bass absorption, I was contemplating sand bags in the corners or bean bag chairs behind chicken wire . . .

Neither bean bags nor sand bags are going to do much to help you with bass trapping. Bean bags are commonly filled with polystyrene beads, as far as I know, and that is basically useless acoustically, since it is closed-cell. Sand has plenty of mass but practically no absorption, so it would help with isolation... (if you could figure a way to surround your entire room with it!) but is pretty useless as bass trapping. Bass trapping is usually accomplished with thick mineral wool or fiberglass absorption, placed in the corners of the room. All 12 of them, if possible. But your booth is way too small for that. Take a look at some of the vocal booth designs on this forum for ideas on how to build and treat a vocal booth.

I know that low frequency is my battle. I plan to put as many angles in the room as I can.

Angles won't help much with low frequencies. Angled walls help stop flutter echo, but don't do much to treat lows, and do even less to isolate. It seems like you might be mixing up "isolation" and "treatment" all at once: they are tow different things, really. And the are accomplished with two different types of materials. Mass for isolation, and absorption for treatment. Basically. But it's much more complicated than just that. - Stuart -

Thank you very much. You just saved me a crapload of work. I will make the absorption as thick as I can and forget the angles. I will check out the vocal booths. All the best. 8)