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Author Topic: bass traps and sound proofing door cheap as possible. need advice.(update:done!)  (Read 1924 times)

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RexAeterna

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Yea, just need bit help since I forgot lot of stuff. Anyhoo,  I was thinking just buying some but I think I'll be better off doing it myself so i do have some questions.

Material? I know roxul rock wool is best for money but what type? I was thinking of the safe n' sound stuff. It's 3" thick and comes with 12 slabs that are 2x4 so I was thinking of cutting each slab in half so there will be 24 slabs of 2x2. Plan on taking care of my corners first. That's my first priority since my overall room and listening position is not that bad with high and midrange frequency due to my listening distance, density of my futon and room due to it being drywall so it'll be real easy I assume for absorption on that part. But first corners and front back ceiling.

I plan on buying one bag for now due to cost and since I plan on cutting each slab in half there should be more then enough for each corner(3 for each corner).

Thing is one corner is bit smaller near the floor due to closest door but ceiling is fine. Think of doing the ceiling part only so there be 21 pieces used and 3 left. I was thinking of compansating by 2 behind me on the back ceiling and 1 on the front ceiling so it'll be like triangle format.

Thing too, is how I place them without too much issue and is simple? Was thinking of wrapping the wool in shirts or something and then thumb tack, staple or double adhesive tape maybe. Is that fine? Is it effective? Is the safe n' sound stuff good choice? It being around 45 bucks a bag it can get pricey so, I want make sure I get most out my money and not wasted.

Thing I like to do is soundproof my doors too. The main door and closet door. I was suggested foam board cheapest and effective option. What type, if there such thing? I plan on using double adhesive tape for the foam on the doors. I plan as well to get everything hopefully at a local home depot.

What is your suggestion(s)?

Edit: forgot mention, the room is about 15x15 and ceiling to floor around 12ft.

« Last Edit: November 12, 2014, 07:42:58 PM by RexAeterna »
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thune

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #1 on: October 25, 2014, 07:07:35 AM »

If I remember correctly from Floyd Toole talking about these things, it's not so much the stuff itself but that "absorbers should be at least three inches deep". Some day, I'm actually going to read his book.
« Last Edit: October 25, 2014, 07:26:49 AM by thune »
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thune

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #2 on: October 25, 2014, 07:46:43 AM »

I certianly remember using this stuff in the late 90's, it was a thin tarp like material above a 1" fiberglass pillow, encased in a light burlap-y fabric. Seemed like it did more than the theory would suggest. But that stuff *was* enough to get rid of slap-echo and other wah-wah-wah crazy crap in a room that clapping could evoke. My stereo guru at the time preached doing the minimal amount to a room to make it acceptable, and those crazy corner-tunes at the the true 3-wall verticies worked wonders. ["Don't kill it".]
I reveal it here (as a changstar exclusive :)p7): putting a few phone-books in the bottom corners of a room can provide a very interesting tunable, akin to what corner-tunes can do at the ceiling points. [I like more in front (4-8") and fewer in back (3-5"), but it depends.] A tweak was never cheaper.
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DaveBSC

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #3 on: October 25, 2014, 08:08:38 AM »

If I remember correctly from Floyd Toole talking about these things, it's not so much the stuff itself but that "absorbers should be at least three inches deep". Some day, I'm actually going to read his book.

It depends on what frequency ranges you're trying to target for absorption. Traditional broadband adsorption panels that you might put at the first reflection points are typically around 2" thick. Bass traps on the other hand tend to be 4"+, and the lower you want to go, the thicker material you'll need. You can put a flat bass trap across a room corner leaving an air gap behind which will increase its effectiveness compared to having it flat on the wall, but a tri-trap in the corner will still beat it.

A 15x15 square is going to produce hellish bass modes, so that's definitely first thing that'll need to be dealt with if you want to get even half way decent response, and even after that, you're going to have to fight the square every step of the way.
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RexAeterna

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #5 on: October 26, 2014, 05:05:06 PM »

The 703 is too expensive and at that thickness be less effective than safe n sound rockwool. I found a site which shows the coefficiency of each material on wall and 16" away from wall at frequency down to 125hz. Seem safe n sound is 0.52 coefficient at 3" thick at 125hz which is pretty decent for it's density and can atleast absorb half the energy to slow it down good amount. So doing all corners now is good idea and buy another bag next month to double up to 6" . Will be placing my speakers on cinder blocks too, to help with everything.

Still need advice on the door issue. I saw R10 foam board and some other brand (armax or something) but being 20 bucks for piece of foam will it even be woth it? Need something simple to stop sound going through the hollow old wooden door.
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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #6 on: October 26, 2014, 05:48:07 PM »

hollow old wooden door.

Can a hollow old wooden door be filled with anything?
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RexAeterna

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #7 on: October 26, 2014, 07:06:03 PM »

hollow old wooden door.

Can a hollow old wooden door be filled with anything?


Can look but I don't think so. I would use wool but for now my budget is only allowing one bag of stone wool to take care of the corners only and was told foam board should be fine for isolating sound from the room. The armax stuff is 2" thick and cost less than the R10 pink foam board but seems only about 1" thick. I think the armax probably most likely do better. Just seeing if anyone ever used foam board before. I watched couple vids saying foam do fine.

My speakers are about 12ft away from the door since I have my set up against the windows on opposite side of the room.
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RexAeterna

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #8 on: November 12, 2014, 03:08:47 PM »

I want to update this. I decided to buy some R30 fiberglass instead of the safe n sound.  Home depot has major 20 percent off sell on all fiberglass and the r30 only costing 13 bucks for a 25ft roll, what the hell right. It is 9" thick and the site I was using for reference on coefficient data suggested that the R30 has a coeffiency of 1.14@125hz which is really good.

I used one roll for my door. I used all 9" thickness cause might as well since fiberglass compacts so easily.  Worked out perfectly.

Then I still had enough least leftover to do the corners behind my speakers and had a remaining 3ft in length leftover from the corners so I just put in on the floor behind my listening spot.

Worked out better then expected. Boominess I had behind my speakers disappeared.

I bought another bag yesterday and plan on finishing off my room today. See how it turns out.
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RexAeterna

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Re: bass traps and sound proofing door cheap as possible. need advice.
« Reply #9 on: November 12, 2014, 07:36:26 PM »

Room finished! Made huge difference.  I mean damn, never heard such clean deep bass my speakers were able to produce. Imaging is major improvement as well.

All corners are done in a tripod fashion. I still had some left over so I made a 3ft panel for behind tv and about 4ft 1/2" behind my listening spot. They all stayed 9" in thickness even though I know 9" is way more then enough for midrange and high frequency but I didn't bother trying ripping the fiberglass in half or so.

Everything is finally done and im very happy with results.
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''I'm a music lover. Not an audiophile.''

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''I have no special talent. I am only passionately curious.''

''Logic will get you from A to B. Imagination will take you everywhere.''
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