Originally Posted by ChopShop1
Yeah, the bass traps are new to me. I know they need to be used, but am not sure I understand how to place them best and how exactly they accomplish what they do.
This one's easy, ...easy and cheap. There's two types of absorption, pressure based diaphragmatic (like wall movement), and velocity based like fiberglass. We'll focus on velocity based.
The above image illustrates how the need for spacing away from a room boundary is needed to effectively absorb the low frequencies. The bass wavelengths are huge in size. The velocity is greatest at the 1/4 wavelength point, so bass trap effectiveness is aided when spacing the material off the wall.
Bass traps primary need to exist in corners, and spaced off the walls.
You've got to get the energy when it's moving, the closer to the wall, the less the energy is moving so it needs to be thick, and spaced off the wall.
is Ethan Winer's superb paper
on room treatment. Contained therein is bass traps etc.
There's a certain type of bass trap called the SSC, or Studio Tips Superchunk. Here
that process is detailed.
is a fantastic place for acoustics related threads, the one I linked to is a nice bass trap summary. Here
they have an entire board dedicated to bass traps and treatment.
--------------I'd suggest the Ethan Winer paper first, it's really good.
Bass traps address the time domain, by damping excessive ringing in the bass octaves. This allows better note to note delineation of bass detail, tighter bass and fewer nulls,..smoother response. All small rooms need significant bass trapping. Oft cited, oft overlooked. Huge gains are to be had.
The latest info suggest cheap pink fluffy is best for thick bass traps. Cheap, very effective,...win-win!
Best of luck