Dataset: woven_sound.dat Source: S. Sengupta (2010). "Modeling on Sound Transmission Loss of Jute Needle-Punched nonwoven Fabrics Using Central Composite Rotatable Experimental Design," Indian Journal of Fibre & Textile Research, Vol35,#4,pp.293-297. Description: 3-Factor Experiment conducted to maximize sound transmission loss in non-woven fabrics. 20 runs. Factors/Levels: Punch Density (Punches/cm^2) -1.682=70,-1=106.5,0=160,1=213.5,1.682=250 Needle Penetration (mm) -1.682=18,-1=16.4,0=14,1=11.6,1.682=10 Mass/Unit Area (g/cm^2) -1.682=300,-1=442,0=650,1=858,1.682=1000 Variables/Columns Sample number 7-8 Order number 15-16 Punch density (coded) 18-24 Needle Penetration (Coded) 26-32 Mass/Unit area (Coded) 34-40 Sound Transmission loss (dB) 42-48