sheetrock/gypsum/drywall

i have heard that drywall have some strong qualities in terms of isolation and absorbation both. I just want to know it would be helpful to make a dead room using drywall on wooden studs lined with insulation around 3-4" or it needs some other absorber also..... i just needed a enviornment from where i can get good violins.... strings and winds........ what i can have a reflective concerate floor...... i have though to make some wall of drywall with insulation and some of with cloth covered insulation ..... krish

Krish - drywall is good for sound isolation but it is not an absorber of sound. To absorb sound you need various absorbers to built within the room. Go to http://www.saecollege.de/reference_material/index.html and read absorbers and then go to http://johnlsayers.com/Studio/index.htm and check out the construction pics of the studios there. Cheers JOhn

:?: Well after going through what i have understand that deaden a room is only possible through the various absorber across different frequencies...... i think for the lows i will use hangers in my two vertical corners that are giving my wall depth around 19"..... this corners will not only works with hangers but also corner traps...... i am planning to split it into two parts one for hangers and reamining top part for corner bass trap..... on my angled wall same slot resonator tuned for low-mids 150-800.......... or may be one down to 150 also as some notes of string instruments are too low ....... i am planning to keep alive some highs as its gives a life to track and that can be done by my concerate floor only. and one more option is to make everything dead and bring down reverbation time.... any feedback? regards

That sounds fine - you seem to know what you are doing. :) cheers John

i dont know it works or not.....

I'd head in this direction cheers john

some querries regarding your drawing: rear wall of room with High Frequency insulation and covered with drywall? two slot resonator walls: tuned for which range of frequencies? Corner traps split into two parts the lower one for acoustic hangers? krish

rear wall of room with High Frequency insulation and covered with drywall?

No exposed Insulation with a cloth cover.

two slot resonator walls: tuned for which range of frequencies?

Tuned to the low-mid frequencies.

Corner traps split into two parts the lower one for acoustic hangers?

Yes you could do that. cheers john

should i tune my wide band slot resonator for 150-800hzs...... ? or have to treat lows down to 150hzs also? krish