Room acoustics is one of the trickiest aspects of building a dedicated Home Theater room, or of taming any room for that matter. As my subject line implies, how much is enough, and how much is too much?
If you have ever been in a Anechoic Chamber, you know what a creepy experience it is. It is scary quiet and acoustically dead in there. If you over compensate your Home Cinema room, it too becomes dead and lifeless. However, if you leave it at bare walls, then likely it is going to be a reflective nightmare.
As in a concert hall, a degree of reflections add life to the sound, it gives it a fullness and presence. But how much reflection and from where is the question that I've yet to find an answer to.
Diffusers can break up the sound and prevent standing waves, and are probably essential to a Home Cinema room. But Absorption is equally important, and knowing when and where to place absorption is an important as knowing when and where to place Diffusion.
Then we get into degrees of absorption. The deeper the absorbing panels, the lower the frequency they are capable of absorbing. Thin convoluted foam acoustic panels absorb mid and high reflections, and also have a degree of diffusion. But to soften bass, it takes some pretty deep panels. I would say on the order of 6" or deeper.
So, my question is, how does one find that balance between absorption and diffusion, and between too much and not enough. And compounding the matter, it is not as simple as having absorption and diffusion, but where you place it is critical.
According to the recent article in Home Theater Magazine on Acoustic, the acoustics of a room are no small matter, they weigh heavily on the sound quality within the room. And as such, I find it odd that so little information is available on addressing room acoustic with an eye on how much is enough and where precisely to apply the room treatments?