John Sayers' Recording Studio Design Forum Archive

Many folks are interested in ’Healthy' 'Green' and other, alternatives to Rock and Glass Fibre.
I would like to start a growing list here.
I will kick the ball in just to get the game started....

Wood:-
Steico
Celenit
Tectum
Homasote
Flex 50 Germany

Polyester:
Caruso Isobond
Autex
akotherm
Sintherm
Martini, Australia
Greece Alpha Acoustiki https://alphacoustic.com/en/
They sell the raw 34KG Polyester Batts 120x60x5 cm and other sizes afaik.
Another EU source of Poly http://www.eurokustik.com/english/ec...n-sp50d40.html

Fibralco, Greece

Naturtherm

Isofloc

Hemp, Italy

Biofib, France


Cotton:
UltraTouch
http://www.soundproofcow.com/product...oustic-cotton/

SheepsWool
Hemp

Thermo Hemp 045 acoustic absorption figures http://www.babic.com/TEMP/SCHALL_Englisch.pdf
for the 160mm version the result according to ISO11654:
• 125Hz 0,85
• 250Hz 1
• 500Hz 1
• 1000Hz 1
• 2000Hz 1
• 4000Hz 1

Enjoy, DD