Ive seen quite a few alternatives to rockwool coming onto the scene including these composite foams and mineral impregnated vinyl (and combinations of both!). Anyone tried them or has anyone tried the old industrial method of foam - lead sheet - foam sandwhiches?
Alternatives to rockwool.
- Thread starter shred101
- Start date
John_C
formerly Skeksis268
It all comes down to the density and measured NRC. Then of course the price.
I probably wouldn't even consider an alternative unless it was drastically better or cheaper.
But all insulation and building materials typically have the NRC measured.
I probably wouldn't even consider an alternative unless it was drastically better or cheaper.
But all insulation and building materials typically have the NRC measured.
John_C
formerly Skeksis268
waltz mastering
Member
It really depends what you're trying to do.
Absorb sound or isolate sound?
Here is a chart showing the absorption coefficients of the more common materials:
http://bobgolds.com/AbsorptionCoefficients.htm
Isolation mainly. Im building a booth but want to conserve as much internal volume as possible because its in an alcove which is already really isolated from the rest of the house and adjoining houses. If i'd have used standard 60mm rockwool then that would translate to a huge amount sheared off the volume and there wouldnt have been much space left in it after covering it with thin booth acoustic tiles. Hence looking at alternatives before I commit to packs of 30mm rockwool.
waltz mastering
Member
Rockwool alone will not help with isolation.
Check Green Glue
http://www.acousticalsolutions.com/green-glue3?gclid=CNjZ15Pr1KACFctx5QodIieksw
MLV
http://www.soundaway.com/SearchResults.asp?Cat=122&gclid=COfQjLzr1KACFUdd5QodpgzSuw
press board and sheet rock.
http://www.soundproofing101.com/soundproofing_2.htm
http://www.acoustics101.com/
AudioPhile777
Mathew Cohen
Wouldnt you still need a decent amount of absorbtion as well considering that the volume is so small though? I basically just want a place to mic up amps and to do vocals in without pissing off the neighbours and this part of the house just screams "booth" at me every time I look at it. I figured that if you had a totally reflective isolated structure like maybe a stud wall built inside the alcove (which would be easier tbh) that even with decent tiles covering it the sound would suffer.
waltz mastering
Member
There's a couple ways that you could go about it. If you want isolation for loud amps you could do a stud wall insulated with rock wool then covered with two layers of drywall with green glue between the 2 sheets of DW.
For vocals, reflections aren't usually desired, so you can hang owens corning 703 panels covered in fabric and acoustic foam on the drywall to absorb any relfections. my 2 cents.
Yeah that sounds nice and simple but the alcove is only 86 cm wide. Its quite a bit longer though. After all that drywall and studding and rockwool Im not going to be able to fit much in it. I was originally going to just add a plasterboard stud using the skirting board to as bottom support but I figured Id need some absorption as well. So far im planning on 30mm slabs of rockwool fixed to hardboard, covered in fabric + thin crappy tiles and isolated from the wall using thin neoprene strip (tbh the glue would be better than neoprene strip thinking about it and would save me some internal volume). I've also got to be able to strip them back out when I move because its a rented flat.
Even with the plans I have at the moment Im going to be down to like 78cm width and that only just fits a marshall 1960a cab. Im hoping that the peaveys the other dude I work with will come in somewhat smaller and my laney pro-tube I wont have to worry about because its tiny.
I dont really know if the sound will suffer due to lack of internal space or being pointed at a wall only a few cm away which it would be if I aimed cabs down the width of the booth. I've seen these boxes that people use to put amps in but again, I dont know how being placed in a confined space would affect the sound of a big cab going into a mic.
Even with the plans I have at the moment Im going to be down to like 78cm width and that only just fits a marshall 1960a cab. Im hoping that the peaveys the other dude I work with will come in somewhat smaller and my laney pro-tube I wont have to worry about because its tiny.
I dont really know if the sound will suffer due to lack of internal space or being pointed at a wall only a few cm away which it would be if I aimed cabs down the width of the booth. I've seen these boxes that people use to put amps in but again, I dont know how being placed in a confined space would affect the sound of a big cab going into a mic.
Yeah thats as I figured. Ive never tried them myself but the last one I saw basically looked like a shitty kitchen chipboard cupboard with some foam on the inside.
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