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Post by widespreadpanic on Apr 10, 2019 6:35:05 GMT -5
What is the best sound absorbing material? Thank you for your consideration.
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Post by novisnick on Apr 10, 2019 7:23:03 GMT -5
What is the best sound absorbing material? Thank you for your consideration. I had the same question years ago, RockWool, it’s used in elevator shafts to keep noice down and one of the best thermal insulation materials used. Build your traps with it with confidence. |
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Post by dsonyay on Apr 10, 2019 7:53:15 GMT -5
Is this a good material for corner bass traps (the rockwool)?
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Post by creimes on Apr 10, 2019 8:05:33 GMT -5
This is what I built all my panels with, also used 1x4 mdf and walmart sheets  |
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Post by jlafrenz on Apr 10, 2019 8:28:52 GMT -5
It depends on what you are trying to absorb. Different materials and densities with impact different frequencies.
Generally speaking, Roxul Safe N Sound, Roxul 60, Owens Corning 703/705 and OC Fire and Sound are commonly used products. "Pink Fluffy" is a commonly used product for corner chunk bass traps.
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Post by geeqner on Apr 10, 2019 9:18:55 GMT -5
It depends on what you are trying to absorb. Different materials and densities with impact different frequencies. Generally speaking, Roxul Safe N Sound, Roxul 60, Owens Corning 703/705 and OC Fire and Sound are commonly used products. "Pink Fluffy" is a commonly used product for corner chunk bass traps. Have not researched this topic in-depth - but most technical situations have a "IT DEPENDS..." solution. THE "ABSOLUTE BEST":Most Anechoic chambers us wedges of various sizes, placed at a mix of rotations. The idea is that sound hits them and is reflected-off at various angles, and is FURTHER broken-up and dispersed by adjacent wedges (not sure if the wedges are coated with soft or hard material - an educated guess would be soft or a combination) SIMPLE & CHEAP:If "The Best" in your case means something easy to provide some absorption in a room with lots of hard surfaces - try combinations of the following: - Hang some curtains (they don't have to be covering a window)
- Tapestries (chunks of carpeting, tastefully hung to walls in selected areas)
- Sound-Absorbing / deadening panels
- Get some "surplus" office-furniture "cubicle" walls
- If building new walls - insulation inside deadens sound / makes them less "permeable"
CHEAP & EASY DIY ACOUSTICAL PANELS:
At our office, we have some simple panels that were made to approximately "match" our cubicle walls:
They started with sections of rectangular cross-section ductwork, which was made of a "spun fiberglass" material
(The stock ductwork was approximately 18" X 18" square in various lengths)
The seams were separated - making rectangular panels with beveled edges
the panels were covered with a colored fabric (burlap-like, but nicer colors) and secured on the back side with spray adhesive
(They also hold pins nicely if you / your kids want a place to "tack-up" some photos / etc.)
BLIND FASTENERS:
Mounted to the wall with concealed rectangles of "bed of nails" plates that are normally used to build roof trusses
(nails facing OUT from wall - stick a small screw through the holes & use drywall anchors)
Place the panel against "nail plates" and gently thump it into place with your fist
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Post by dsonyay on Apr 10, 2019 9:20:00 GMT -5
It depends on what you are trying to absorb. Different materials and densities with impact different frequencies. Generally speaking, Roxul Safe N Sound, Roxul 60, Owens Corning 703/705 and OC Fire and Sound are commonly used products. "Pink Fluffy" is a commonly used product for corner chunk bass traps. Pink Fluffy ... Do you mean the fiberglass ? Or is this the actual name? I'd like to make my own bass traps in my room David |
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Post by lrobertson on Apr 10, 2019 9:38:24 GMT -5
I’ve read for the pink fluffy to work well as bass traps it needs to be about 12” thick. Rigid fiberglass or the rockwool sheets don’t need the same thickness due to their density.
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Post by fbczar on Apr 10, 2019 9:40:55 GMT -5
Is this a good material for corner bass traps (the rockwool)? Yes it is. Rockwool is available in 24"x48" panels 2", and 4" thick. The 6lb and 8lb varieties both seem to work well. 703/705 fiberglass is excellent as well and is easier to work with, but is likely more expensive. |
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Post by fbczar on Apr 10, 2019 9:52:19 GMT -5
I’ve read for the pink fluffy to work as bass traps it’s needs to be about 12” thick. I think you are correct. Fluffy fiberglass is likely the least effective material for lower frequencies. When considering DIY bass traps one would be well served to know the frequencies in the room that are problematic before designing a bass trap. 703/705 rigid fiberglass and 6lb rock wool panels are better choices than fluffy fiberglass for lower frequencies. Maintaining an air gap behind the bass trap and room placement in general are critical considerations. |
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Post by novisnick on Apr 10, 2019 9:56:08 GMT -5
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Post by lrobertson on Apr 10, 2019 9:56:49 GMT -5
I’ve read for the pink fluffy to work as bass traps it’s needs to be about 12” thick. I think you are correct. Fluffy fiberglass is likely the least effective material for lower frequencies. When considering DIY bass traps one would be well served to know the frequencies in the room that are problematic before designing a bass trap. 703/705 rigid fiberglass and 6lb rock wool panels are better choices than fluffy fiberglass for lower frequencies. Maintaining an air gap behind the bass trap and room placement in general are critical considerations. It does seem like the guys who have the room to use the pink fluffy that thick swear by the performance though. They seem to argue for it over other options. |
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Post by fbczar on Apr 10, 2019 10:21:27 GMT -5
I think you are correct. Fluffy fiberglass is likely the least effective material for lower frequencies. When considering DIY bass traps one would be well served to know the frequencies in the room that are problematic before designing a bass trap. 703/705 rigid fiberglass and 6lb rock wool panels are better choices than fluffy fiberglass for lower frequencies. Maintaining an air gap behind the bass trap and room placement in general are critical considerations. It does seem like the guys who have the room to use the pink fluffy that thick swear by the performance though. They seem to argue for it over other options. I have read that stacking rolls of fluffy fiberglass floor to ceiling works well. Of course, in that state the fiberglass is compacted pretty well. All you would need to do is stack it floor to ceiling in a corner and then put a screen of some sort in front of it for aesthetics. It would be easy and inexpensive to try. |
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DYohn
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Posts: 18,493
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Post by DYohn on Apr 10, 2019 10:25:23 GMT -5
Also remember that all rooms can benefit from properly used acoustic treatments, but some rooms can be destroyed by improperly used treatments. Make sure you measure, test, and measure again.
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Post by jlafrenz on Apr 10, 2019 10:31:10 GMT -5
It depends on what you are trying to absorb. Different materials and densities with impact different frequencies. Generally speaking, Roxul Safe N Sound, Roxul 60, Owens Corning 703/705 and OC Fire and Sound are commonly used products. "Pink Fluffy" is a commonly used product for corner chunk bass traps. Pink Fluffy ... Do you mean the fiberglass ? Or is this the actual name? I'd like to make my own bass traps in my room David The would be fiberglass insulation like an R-19 or similar. For corner traps make sure to get the unfaced. |
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Post by jlafrenz on Apr 10, 2019 12:04:38 GMT -5
It depends on what you are trying to absorb. Different materials and densities with impact different frequencies. Generally speaking, Roxul Safe N Sound, Roxul 60, Owens Corning 703/705 and OC Fire and Sound are commonly used products. "Pink Fluffy" is a commonly used product for corner chunk bass traps. Pink Fluffy ... Do you mean the fiberglass ? Or is this the actual name? I'd like to make my own bass traps in my room David I will see if I have pictures of my corner chunk build that I can post as well. |
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Post by lrobertson on Apr 10, 2019 13:43:04 GMT -5
I don’t remember the concept but the guys claiming 12” of pink fluff to be the best overall we’re backing up their claims through supposed measurements and physics properties of how the fluff interacts with the low frequency waves through the longer distance with the fluff fully expanded not condensed. Just some hearsay. Might be worth looking into with those forums. But that is 12” hung minimum thickness. I imagine an air gap would still be desired. Been a long time since I was reading up on it but I plan on going that route since I have the room. I went with linacoustic walls and diffusion for the rest of the higher frequency areas.
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Post by jlafrenz on Apr 10, 2019 16:32:00 GMT -5
I don’t remember the concept but the guys claiming 12” of pink fluff to be the best overall we’re backing up their claims through supposed measurements and physics properties of how the fluff interacts with the low frequency waves through the longer distance with the fluff fully expanded not condensed. Just some hearsay. Might be worth looking into with those forums. But that is 12” hung minimum thickness. I imagine an air gap would still be desired. Been a long time since I was reading up on it but I plan on going that route since I have the room. I went with linacoustic walls and diffusion for the rest of the higher frequency areas. There are tons of threads over on GearSlutz about acoustics and the "pink fluffy". They can be a little daunting to sort through and don't necessarily have a definitive answer. The general rule is that for the "pink fluffy" to be effective, it has to be fairly thick. The ones I have built are 24" along each wall with a face of almost 34". This gives them about a 17" depth assuming I can do math correctly. |
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Post by widespreadpanic on Apr 10, 2019 18:12:51 GMT -5
Thank you all kindly for your input. I am planning on enclosing my carport and converting it to a dedicated listening room and want to do it the right way.
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DYohn
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Post by DYohn on Apr 10, 2019 18:13:59 GMT -5
"Pink Fluffy" is my pole dancer name.
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