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Why don't you use someting like this ? :

The Room EQ Wizard might be able to help you with the placement and settings for your equipment (note that you'll need a decent microphone or an spl meter).

The space required. If I remember correctly, stopping bass using acoustic panels would require seriously thick panels - like half a meter or something. His room is tiny as is.

Might as well hire Gandalf.

Gloom: I can't wait to see what nightmares a subwoofer will bring :)

Canopy: could you share some pictures?

sol_hsa: hahaha Thou SHALL bass, but controlled :)

2 mins, i've got some old ones

Here ya go. I completed it around oct/nov last year just in time for winter.

Its changed a fair bit since then, either because I've bought more stuff, or put things in places where they work better. the general layout remains the same though.

http://www.flickr.com/photos/canopyseer/sets/72157635041950720/

Canopy: cool.

Hmm.. I'm looking into building some diffusers my self, and I'm wondering why all diffusers are made out of squares?

Would it not be better to use round shapes? I was thinking about using some of those isolation foam tubes which come in round tubes, instead of using square blocks or alike.

I know cubes are cool and very demoscenish, but are they better than a round shape?



Anyone got some experience or knowledge on this subject?

If you have the space for it, "room within a room" is the way to go. Keep in mind that this won't solve many of the reflection issues inside the room, but it will help both keep sound out and in the room. In other words, it will make it easier to record (keep outside noises out) as well as easier for you to play loud (keep the inside noises from leaking out).

Also, when isolating sound, DON'T FORGET to seal all small leaks, such as spaces between wall and roof, floor and wall etc.

maytz: Hard, sharp edges breaks up soundwaves better than soft, rounded edges. Each compartment in a diffusor is supposed to be tuned to a specific frequency, but they rarely are. Also: Cubes stack better. :)

When it comes to your room, I would suggest trying to lend/demo a KRK or JBL room correction system from somewhere. Your room is so tiny and probably full of harmful reflections and modes that it wouldn't hurt to try. Just remember that the sweetspot in those systems are very, very narrow. You pretty much need to keep your head exactly where the mic was during calibration.

irvin: sure hard shapes breaks up the soundwaves better, but they will also diffuse in 4 directions :)

Round tubes could perhaps diffuse in an more odd way, yes/no? :)

Just a thought...

You're never going to get any real bass in that size room with any speaker setup, it depends on the longest room dimension, at 1.7m, not much (176Hz?)

To stop resonance, you need to stiffen things, maybe another layer of plasterboard all round, including the floor and ceiling.

Carpet floor tiles have pretty stiff backs, but you'll die of fumes from the glue :/

maytz: 5 directions, no? :) Also: there's a reason why anechoic chambers cost what they cost, and why they don't use rounded corners.

Protip: Velour carpeting dampens pretty well and gives a studio that nice whorehouse atmosphere

Yep I've heard this too, but I've also read reviews that it works to some extent. Without testing one myself, it's hard to know whose word to trust ;). Certainly you can't expect it to fix _everything_.

Anyway, I was briefly trying to factor in time spent on everything needed to build a bass trap for the purpose (learning, measuring, building) vs. alternate solutions that could alleviate some of the issues for lesser effort.

Fungas: pretty correct in theory. without damping the echoes the longest clean wave you can project is 200Hz. everything under that gets a phase overlay. you can go lower but the inteference makes the bass dirty, amplified or nullified too.

but one shouldn't forget there's a ton more frequencies in music that makes it less audible. a good mix is valueable.

Gloom: I was more thinking of 360 directions, no? ;)

maytz: don't you mean 6 then? ;)

el-bee: I've been corrected by Irvin on the KRK measuring device in that it can actually do some good in this particular case (small room, many reflections), but that it might indeed not. Can't hurt at least, as long as you just loan one instead of buying it :)

If you're putting foam on the walls, isn't it better to use wedge shapes instead of cubes? Cubes have flat faces, so they'll reflect the wave back into the room, although if you have different sizes you'll at least get many reflections at different phases that should help dampen it.

But I thought the point of these things were that the wedge shape means the reflections bounce many times in the gap between the foam, making them much more effective? (Imagine kicking a ball against a wall with many cubes, then against a wall with many wedges... chances are high that the ball gets stuck in the wedges, and bounces straight back with cubes.)