Hi Everyone.
Need your opinion if you had any experience with these products.
I am considering Elephant Shield Rubber paint for sound damping and sealing wood speaker cabinet(Using wood for body and ply boards for bracing) - Anyone had any experience with this product for sound damping?
Considering ROCKWOOL ROXUL Safe and Silent for sound absorption - Is it good for this purpose?
I am looking for good and low cost solution for wood damping and sound absorption which are available locally.
Other option i have available locally
1. Polyfill/Glasswool
2. Bitumen Sheet Self Adhesive - Black
Thankyou
Need your opinion if you had any experience with these products.
I am considering Elephant Shield Rubber paint for sound damping and sealing wood speaker cabinet(Using wood for body and ply boards for bracing) - Anyone had any experience with this product for sound damping?
Considering ROCKWOOL ROXUL Safe and Silent for sound absorption - Is it good for this purpose?
I am looking for good and low cost solution for wood damping and sound absorption which are available locally.
Other option i have available locally
1. Polyfill/Glasswool
2. Bitumen Sheet Self Adhesive - Black
Thankyou
Rockwool or denim insulation are both great for sound absorption.
As for the damping, I tried using Flex Seal, which is a rubberized paint that I'm assuming is similar to what you are asking about, and it didn't really do much. I think it would need to put on much thicker than is reasonably achievable to have much impact.
As for the damping, I tried using Flex Seal, which is a rubberized paint that I'm assuming is similar to what you are asking about, and it didn't really do much. I think it would need to put on much thicker than is reasonably achievable to have much impact.
Thankyou for your feedback. Yes Elephant Shield is same - Rubber Paint.
Ordered Rockwool, for vibration damping also looked for thick rubber sheets like these "http://www.soundservice.co.uk/dedsheet-sound-damping-sheet.html" but its pricey. Search is on.
Ordered Rockwool, for vibration damping also looked for thick rubber sheets like these "http://www.soundservice.co.uk/dedsheet-sound-damping-sheet.html" but its pricey. Search is on.
Roxul is what everyone recommends over at studio building gearslutz.
it works.
for vibration, sylomer or sorbothane
it works.
for vibration, sylomer or sorbothane
Thankyou, I am reading about CLD.
Thankyou, these are best products out there for vibration damping but they are very expensive.
How good is natural rubber sheet(4mm thick) for vibration damping, anyone tried?
BASF’s patent on “Basotect” reticulated melamine foam expired. Hence they are made in China as magic eraser sponges. The porosity ratio can’t be beat. They weigh nothing and are fire retardant. The acoustic damping is superb. I have not found anything better. It beats felt, fiberglass, rock wool, and polyfill.
Damping Materials
Electron microscope image:
I have found that lining back side of box where driver cone has line of sight - removes boxiness completely.
Best of all, it’s cheap. 100x pads for $6 etc.
20/50/100PCS Cleaning Magic Sponge Eraser Melamine Cleaner Multi-functional Foam | eBay
Damping Materials
Electron microscope image:
An externally hosted image should be here but it was not working when we last tested it.
I have found that lining back side of box where driver cone has line of sight - removes boxiness completely.
Best of all, it’s cheap. 100x pads for $6 etc.
20/50/100PCS Cleaning Magic Sponge Eraser Melamine Cleaner Multi-functional Foam | eBay
I came upon melamine foam as an acoustic absorber for mobile audio. However, the thickness is limited and the melamine foam has to be hydrophobic. I recall reading that the typical 1/2" and 3/4" thickness limits absorption to frequencies above 4K or so. I can't recall where I saw that. However, I found this searching just now. Apparently NASA has performed the tests we'd find useful.
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140008689.pdf
xrk971, thanks for bringing this to everyone's attention. Especially the really inexpensive pieces on eBay. I think I'll be using 2" thick melamine foam to line the backs of the 2-way enclosures I'm currently building.
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140008689.pdf
xrk971, thanks for bringing this to everyone's attention. Especially the really inexpensive pieces on eBay. I think I'll be using 2" thick melamine foam to line the backs of the 2-way enclosures I'm currently building.
Thankyou everyone.
I have already purchased rockwool, now I am looking for something which is not foam and can absorb vibration.
I have already purchased rockwool, now I am looking for something which is not foam and can absorb vibration.
Noico sound absorber sheets.
Noico 80 mil 36 sqft car Sound deadening mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening Amazon.com: Noico 80 mil 36 sqft car Sound deadening mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening: Automotive
Noico 80 mil 36 sqft car Sound deadening mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening Amazon.com: Noico 80 mil 36 sqft car Sound deadening mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening: Automotive
The foil is what makes it effective. A rubber mat alone is not as good, though better than nothing, on metal anyway. Wood panels are a different animal.
Thanks for that reference Shaz. Of course one can layer the stuff to get higher thickness or buy the real thick stuff (grey sheets) from BASF.
One more point about the NASA data. I think for lining loudspeaker enclosures, the absorption would be equivalent to double the thickness used due to reflection from the enclosure wall. So 1" lining in a loudspeaker should result in absorption performance equivalent to 2" of foam in the study, which looked at absorption for the application of acoustic transmittance. Someone please correct me if I'm wrong here.
Roof cement. It can be troweled on to the cabinet wall and leaving it uneven mitigates the sonic problems associated with parallel walls. You can add lightness by mixing in bean bag styrofoam balls (I’ve used the small ones, about 1/8” diameter).
The OP originally asked for damping AND absorption solutions. The roof cement is for damping the enclosure walls, certainly not for absorption. I should have been clearer in my post. Thanks for pointing that out.
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The OP asked for damping AND absorption solutions. The roof cement is for damping the enclosure walls, certainly not for absorption. I should have been clearer in my post.
Hi Craig,
Sorry for any ambiguity in my post; I was making a general comment, not replying to your suggestion, which works well. I would add that if the damping material is solvent-based it should be given adequate time to release said solvents before the drivers are installed.
Cheers, Carl.
Sorry for any ambiguity in my post; I was making a general comment, not replying to your suggestion, which works well. I would add that if the damping material is solvent-based it should be given adequate time to release said solvents before the drivers are installed.
Cheers, Carl.