Treating a small room with diffusers?

Here is a site regarding diffusors :

http://www.truesoundcontrol.com/products/diffusors.html

Google can be your friend....

Thanks Riley, I typically use Google; didn't think of it this time. And I meant "diffusors." But, has anyone heard them work as this fellow states? Can they actually take away from the "dead feeling of absorbtion?"
Can they make your room sound bigger than it is?

There is no simple answer to your question, there are books written on this subject. The 'dead feeling of absorbsion' occurs in an overly damped room. Diffusion per se is not your solution, for example, if your 'deadness' is caused by excessive furnishings, drapes, furniture, etc.

FWIW, it depends on the sonics of your room, why they are what they are, where your problems areas are, and what you are trying to accomplish by putting up room treatments.

Diffusors are good for reducing the effect of direct reflections without deadening them - I would use them on walls behind the speaker or behind the listener. For example, the back wave from a panel speaker usually sound best when it hits the wall behind the speakers and it is diffused, not deadened by absorbers. Diffusors are likewise best behind the listener because it will diffuse, but not reduce second reflections from walls which will continue to bounce around randomly (a good thing, it can make your room sound more spacious, with out excessive brightness.

Absorbion panels are best used for killing first reflections from the wall near speakers (and ceilings - rugs work well enuf on the floor. This is a good thing because you will get a much cleaner initial signal from your speakers - the sound will have a purer tone, less distortion. It will help to enhance and expand the sense of soundstage.

FWIW, there is no cheap/easy fix. I'd suggest that you don't buy anything for your walls until you know exactly what you are doing and why...Of course if you've got spare money and don't like to study acoustic's, hire a pro service like Rives provides. :-)

Typically diffusors and their brethren are applied to treat an empty four wall space to make it suitable for use as a recording space, monitoring environment, home theater or listening room

If you already have a room full of furniture and furnishings it may very well negate the effect of a specialized piece

Before you start spending - and fighting the WAF battles - you might try rearranging furniture or the speakers to see what difference it makes

To the OP

1. What are diffusors?

**** Proper diffusion scatters sound not only in the physical domain but also in the time domain. There are a variety of uses from minimization of comb filtering behind bipole/dipole speakers to minimization of slap echo high in a room to providing the illusion of a larger sound field in the rear of the room.

2. What's the minimum I'd pay for these in a room my size

**** I'd need to know a lot more about it in terms of usage, construction, seating locations, furnishings, etc. before we could even make a rough guesstimate as to what would be appropriate.

3. How do they make a room sound bigger than it is?

**** When you scatter sound physically and in time, it can give the same aural cues as being in a larger space by giving you lower amplitudes from more directions and generally later in time.

Bryan