ROCKWOOL Ѯ , . Ѯ , . Ѯ . Ѯ . . 160 /³ λ10 = 0.034 /() λ25 = 0.037 /() λ = 0.043 /() λ = 0.046 /() 10 % , 60 , 400 , 12 , 1.5 % , μ = 0.30 /() , 2.0