ROCKWOOL Ѯ , . - , .. , . (1000 ), 50 . . Ѯ , , . .ROCKWOOL Ѯ . . ROCKWOOL Ѯ 37 /³ λ10 = 0,033 /() λ25 = 0.036 /() λ = 0.042 /() λ = 0.045 /() , 30 % , μ = 0.30 /() , 2.0