hey guys,
ok first of all, im not from an acoustic background neither do i have a degree in physics but after 8 months of R&D on the world wide web, ,meeting N number of acoustic products suppliers i have come to a conclusion that let it be wood wool, high density fiber mats, auntone boards or anything around is nothing in comparison to big brother "Glass Wool". There are myths about glass wool being a hazardous and all but look around which century are we living in? yes that's right its the 21st century...
First of all you need to know the types of glass wool available and the specific use and NRC of the product. Glass wool can be bought in India from a number of manufacturers "Twiga" being the best of the lot. Glass wool in India is available in wool, roll, semi rigid & rigid forms. They are also classified by their density varying from 24 kg/m2 to 64 kg/m2 (available in India) Ovens corning which is considered as the #1 glass wool manufacturer is now available in India but they still have to import the glass wool from the states which on a budget is not the best thing for you.
Coming back to the point if glass wool is bad for health, i would like to put a point across if that was the case why would manufacturers like GIK Acoustics, Primacoustic etc.. would still be using Glass Wool??
I agree glass wool is hazardous but when exposed to the material directly in contact with body for long periods of time over time. If you have seen any instructional video about DIY bass traps or absorbers, you must have noticed
On one of the well known forums online for acoustic has a test result listed for an acoustic test that was done buy the forum members on products by Auralex, Real Traps, GIK Acoustic and one other company im forgetting the name of, surprisingly the test results shows on the forum revealed that acoustic foam from Auralex had the best results out of the 4. While others absorbers made of glass wool absorbed frequencies ranging from 80hz - 500hz, acoustic foam of 64 kg density absorbed frequencies as low as 25hz - 500hz... I can look for the forum and share the test results if anyone wants to see for them selves.
So moral of the story glass wool in the form of a ready absorber is not bad at all but in contact directly with the body is very hazardous.
So basically why i ranted all this stuff is that after i was completely satisfied with making my own absorber & bass trap, i tested them and the test results were very bad. The low frequency was not absorbed at all, the graph showed absorption from 500hz & above. I gave up on DIY and decided to go with these guys
Cue Acoustic India i tested the bass traps that i bought from these guys from cue acoustic and i was very happy with the test results. The cue acoustic bass traps tested absorption from as low as 40hz to as high as 2000hz. Their broad band absorbers tested from frequency 150hz - 20khz.
So for all you having problems with your room acoustic check these guys out or go the DIY way and if you manage to make anything decent please definitely share it on the forum for us to see.
Regards,
A.H.