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BASWAphon Systems and NRC Ratings
The BASWAphon Acoustical Finish System is available in 3 system thicknesses. The 30mm (1.18") system has an NRC Rating of 0.75, the 40mm (1.57") system has an NRC Rating of 0.80 and the 68mm (2.68") system has an NRC Rating of 0.85.
The BASWAphon Acoustical Finish System Chart illustrates the random incidence absorption coefficient for the 3 system thicknesses. Coefficient testing is made with the BASWAphon systems applied to 5/8" gypsum board following the ASTM C423 Sound Absorption Test guidelines.
How BASWAphon Works
High frequency sound absorption is accomplished by allowing sound wave energy to pass through the micro pores in the finished surface thereafter dissipating into heat energy in the mineral wool.
Low frequency sound absorption is accomplished by sound wave energy hitting the mass of mineral particles on the finished surface, causing the finished "skin" to vibrate in a diaphragmatic action against the mineral wool backing which creates a spring action, again transforming sound energy into heat energy in the mineral wool.
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