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HELP PLEASE Sound Proofing Dust Collector & Compressor Noise

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Forum topic by Calgirl posted 2491 days ago 4811 views 0 times favorited 10 replies Add to Favorites Watch
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Calgirl

188 posts in 2493 days


2491 days ago

Topic tags/keywords: noise suppression dust collector compressor help

Can anyone give advise on how to sound proof a little room containing the dust collector, which is inside the shop? I thought about putting it outside of the shop, but the problem remains because I have one neighbor who might be bothered by the noise. It is easier to just keep it within the workshop, but I don’t want to listen to it either! My workshop is to be built starting next week or thereabouts, so any suggestions or experiences would be greatly appreciated.

-- Forget the health food, I need all the preservatives I can get !


10 replies so far

View Bob #2's profile

Bob #2

3808 posts in 2619 days


#1 posted 2491 days ago

There is an insulation out there for acoustic (sound) dampening. I was in a hardware store in the summer and they had a boom box inside a 10 cubic foot box.
You could not hear it … until you opened the lid.

Absolutely amazing!

Do a google on “acoustic barrier”.
It looks like brown insulation.

Good luck
Bob

-- A mind, like a home, is furnished by its owner

View Myron Wooley's profile

Myron Wooley

226 posts in 2494 days


#2 posted 2491 days ago

The noise from the dust collector seems to come mostly from the outlet. Once I installed the big filters, it quieted down quite a bit, although it still makes it kind of noisy in the shop. It can’t be heard outside through my insulated walls.

The sound is a low-frequency whoosh, really not unpleasant. (You really should have hearing protection on anyways because of the woodworking machinery.)

There might be a few things to consider regarding a little room. I was planning on the same thing, but reconsidered and left it out. First, the motor needs to breathe. It gets hot, so air needs to circulate around it for cooling.

Second, you have to allow for the system exhaust to go somewhere- either outside or back into the shop. I opted for back into the shop, because I didn’t want to deal with 1200CFM of air makeup, especially if I have spent money on air conditioning! There is virtually no breeze coming back from the filters, so I don’t have stuff blowing around, like dust from the outside.

Third, the sight of dust and chips whirling about in the clear cyclone is really cool!

I think if I decided to attenuate the sound, I would buy Sonex panels and install them on the walls adjacent to the cyclone and filters. Also, there are a lot of tips in the Clearvue forums about mufflers and filter enclosures.

-- The days are long and the years are short...

View che's profile

che

123 posts in 2624 days


#3 posted 2491 days ago

Without knowing your setup its a little hard to make specific recommendations. One good way is to build a double wall enclosure made of heavy dead materials on both sides that aren’t touching each other, or touching each other minimally. There is a neat trick in house construction where you place the 2×4 studs every 8” instead of 16” and then offset every other stud an inch or so the first stud is supporting the inside wall and the next stud is supporting the outside wall etc. The acoustic path of least resistance in this modified wall is from the equipment to the sheet rock to the void space to the other layer of sheet rock to the new room every time you go from high dense material to low density a lot of energy is lost. In normal construction the stud bridges the void space. which has a much lower resistance. Heavy layers are preferred in this scenario because they absorb a lot of energy in themselves. Note you don’t want anything that will naturally resonate at an audible frequency so stay away from metals.

Without adding a new / second wall anything soft will absorb a lot of the noise: heavy fabric, old mattresses, blankets, egg crate foam, cardboard boxes stuffed with peanuts, or more cardboard, deep pile carpet on the walls, They insulated the home recording studio in Hustle and Flow with cardboard and foam egg crates (the clear plastic won’t work as well).

-- Che.

View Calgirl's profile

Calgirl

188 posts in 2493 days


#4 posted 2491 days ago

Che,
Thanks very much. I will stagger the wall studs as you suggest. I’ll let the builders do the outside shell and then I’ll place staggered studs in between the builders studs for the room. I am going to construct the other 3 walls so I can do as you suggest. An earlier poster suggested a “brown” acoustical insulator that I would like to place inside of the walls if I can find out what it is. So far, in my Google search I’ve found Hermosote which sounds like it may help, but I’m still searching. A quieter workshop will be a joy to work in.

Thanks again

-- Forget the health food, I need all the preservatives I can get !

View Calgirl's profile

Calgirl

188 posts in 2493 days


#5 posted 2491 days ago

Wow…. I’m getting a lot of good suggestions and I really appreciate it. I’m going back to the ClearVue site
and read up on accoustics.

Does anyone know what the “brown insulation” is that Bob wrote about in #2?

-- Forget the health food, I need all the preservatives I can get !

View hermanv's profile

hermanv

17 posts in 2621 days


#6 posted 2491 days ago

In my shop video I have breifly demonstrated the acoustic change with staggared studs. I have a 5 HP 14CFM @ 90psi compresser that I needed to keep quite. I am able to have a telephone conversation right next to the enclosure.

View bryano's profile

bryano

546 posts in 2531 days


#7 posted 2491 days ago

Im not sure about brown insulation, but they are sound proffing a conference room at work. they are using a 1” thick yellow fiberglass pannel. they come in 4’x8’ sheets. the only sound comes from the door.

-- bryano

View Sawdust2's profile

Sawdust2

1467 posts in 2685 days


#8 posted 2490 days ago

To add on to MyronW’s comment I’ve read that one of the problems with exhausting to the outside, in addition to the loss of heat or cool, is that if your shop has common air with your gas furnace and/or gas water hearer, you stand a good chance of sucking out the pilot light.

-- No piece is cut too short. It was meant for a smaller project.

View kwhit190211's profile

kwhit190211

44 posts in 2353 days


#9 posted 2241 days ago

I built a small Bag House outside & attached to my shop. I also louvered the windows to keep out the weather but to supply cooling air to the collector when it is in operation. The sound with it running outside isn’t loud at all. Seems like the wood & louvered windows cut down on the noise a lot.
My shop tools make more racket then the collector anyways.
I make it a practice to not to fire up my tools before 0830 hours (8:30 AM), anyways. And, I shut down tool operation on or before 2000 hours (8:00PM) at night. Makes for happier neighbors, and tool operation is not continous anyways, in my shop.

View GaryK's profile

GaryK

10262 posts in 2586 days


#10 posted 2241 days ago

Here’s my solution:

Click for details

I guess I could insulate it to cut down noise even more, but it’s not that bad.

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

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