Ok, so I'm not one to speak much in terms of sound dampening and making rooms sound good. But I came up with this method:
 
Take a rather large, pretty flat bin with holes in it (like a flat basket) and fill it with insulation/dampening material... then wrap in fabric! Makes for a permanent OR mobile dampener that is lightweight and easy to hang.
 
Now like I said, I'm not a room-guy, and heck, my studio doesn't even HAVE any permanent solution, so I can't say much for if this thing would work... but I definitely would like to give it a shot.
I need to find a CHEAP, decent solution for reducing those reflections, and hopefully I can put some of these things tougher this summer.
 

Check this out for some suggestions.

It would probably dampen something, although without testing it and knowing more it's a shot in the dark to guess how effective it would be.I'm not sure if you mean a small vocal kind of dampener or are you talking about something that would handle the whole room?...because if you mean the latter then you probably don't have a prayer that it would do much for an entire room.
 
I have heard some of your recordings and it doesn't sound like a serious problem on my end. Some pretty well known mixers here don't use anything (as a vocal trap)...I guess it depends on your room...if you understand mic patterns and you know what a tight cardoid mic is....you might get away with it ok. One thing I sometimes do is put my back up against a big sound absorber i.e. a closet full of clothes will do. Whatever bounces off the wall in front of you will come back into the closet and should mostly be absorbed. If the mic is an effective cardoid, it should pick up little or nothing in front of you, but if you wanted to be doubly safe treat that too.

Or try the ultimate in ultra-portable budget absorption devices: earplugs!
 
Just kidding. The thing to remember is that in order for an absorber to be effective, it has to have three qualities:
1. Be permeable (or resonant)
2. Have significant mass (3+ lbs per square foot)
3. Be physically as large in surface area as the longest wavelength you want to affect
 
Therein lies a possible weakness in your clever idea: if the basket is, say, 18 inches in diameter it will have a rapidly diminishing effect on wavelengths longer than 18 inches (IOW, below ~750 Hz).
 
Even at frequencies that it could absorb, 18" of treatment represents a tiny percentage of the total surface area of the room. You'd need dozens of baskets stacked floor to ceiling and covering 25% or more of the walls before you'd hear any difference. Otherwise, it would be like putting your thumb over the corner of a full-length mirror and expecting the amount of light it reflects to be noticeably less.

Another (cheap?) Sound Dampening Idea!!
 
"Two words?" Ball gag...

Naughty, Naughty!
 

1. Be permeable (or resonant)
 
Keep in mind that this doesn't necessarily mean the container has to have holes in it. If the sound you want to absorb passes through the container's "shell" it can be absorbed by something inside the container. The container's shell will reflect some frequencies and pass other frequencies. 
 
2. Have significant mass (3+ lbs per square foot)
 
High quality furniture will often have 2.75 to 3 lbs per cubic foot cushion stuffing. You can have some good absorption and a nice comfortable place to sit at the same time.
 
3. Be physically as large in surface area as the longest wavelength you want to affect
 
The most effective absorption occurs at 1/4 and 3/4 wave lengths. The placement of an absorber with respect to the direct source and or the early reflections will have an impact on the respective frequencies it is effective at absorbing.
I make mention of this to highlight the idea that a chunk of absorbing furniture placed in the middle of a room can be very useful. In other words the absorbers don't just have been located up on a wall.
 
 
Additionally, it seems as if anything you can place in a corner to absorb the bass energy that collects in them will help make a noticeable difference in the clarity you hear in a room. It's a great place to start and it doesn't require too much thinking.
 
best regards,
mike
 
 
spelling

Bless me Father for I have sinned... And may do so again? (the flesh is weak) I actually have part of my house set up as a studio? I have the walls covered in that acoustic foam? With the little triangles in it? And it's carpeted. It works pretty well for me, I know everyone does not have this option. But? If it's your passion? I say "GO FOR IT!" 
 
GO
FOR
IT...
 
You can actually see it in this picture? There's other shiz going on as well? Bass traps and whatnot, but I say, treat the room! Don't just treat the space you're singing in to? Of course it's not "cheap?" But then again? What do you really want that's cheap?
<-------
 
I sit in this room for hours each day? You probably do too? So WTF? Do it up right dude. "Save up" and do it up right... You can enjoy it for many years to come.

Ya know, Rob, you are totally right, I realized... I'm sure it's better to just do it right once and be done with it for years to come rather than have a temporary, not-even-complete solution. Guess I'll just have to do that, haha

Don't forget the "you know..." It can help keep things quiet too? Don't want the neighbors asking too many questions.