Introduction Fire Performance Sound Transmission Sound Transmission Class of Wall Constructions Sound Absorption NRC Values Sound Absorption Coefficients Back to Index page

Tontine Sound Batts ACOUSTIC DESIGN MANUAL Cont. ..Sound Absorption Coefficients The following reverberant sound absorption coefficient tests were carried out in accordance with AS 1045-1971 "Measurements of Absorption Coefficients in a Reverberation Room" by Challis and Associates Pty Ltd, NATA Registered Laboratory. TBS Products Frequency             Product 125 250 500 1000 2000 4000 NRC TBS 3 TBS 4 TBS 5 0.34 0.32 0.36 0.38 0.52 0.56 0.52 0.65 0.73 0.56 0.72 0.75 0.64 0.75 0.80 0.62 0.88 0.86 0.50 0.65 0.70 25mm TBL Products Frequency             Product 125 250 500 1000 2000 4000 NRC TBL 20/25 TBL 32/25 TBL 28/25 0.17 0.20 0.15 0.30 0.28 0.35 0.45 0.52 0.60 0.55 0.69 0.75 0.62 0.73 0.83 0.67 0.78 0.93 0.50 0.55 0.65 50mm TBL Products Frequency             Product 125 250 500 1000 2000 4000 NRC TBL 20/50 TBL 32/50 TBL 32/75 TBL 32/100 TBL 48/50 0.27 0.23 0.33 0.36 0.21 0.54 0.52 0.76 0.86 0.56 0.74 0.81 0.92 1.04 0.86 0.85 0.90 0.96 1.05 1.03 0.88 0.95 1.06 1.16 1.04 0.87 1.01 1.15 1.21 0.99 0.75 0.80 0.90 1.00 0.85 For additional technical data on the Tontine Polyester Insulation acoustic range of products, refer to the individual data sheets for Tontine Sound Batts and Tontine Black Liner products.