Dataseries 1
     
Frequency, Hz -    SPL,dB (Ballast, Slab, Grass)
32 	57.43 	72.25 	60.55 
40 	54.78 	70.07 	56.82 
50 	53.58 	67.21 	55.36 
63 	51.66 	65.07 	54.17 
79 	50.49 	62.60 	53.48 
100 	50.79 	61.71 	51.19 
126 	50.36 	63.41 	51.36 
158 	53.25 	62.59 	54.70 
200 	58.84 	60.06 	67.49 
251 	64.15 	60.52 	62.81 
316 	65.38 	64.73 	61.57 
398 	63.29 	72.32 	61.56 
501 	61.96 	71.92 	65.07 
631 	64.89 	68.03 	70.36 
794 	65.98 	63.12 	69.71 
1000 	64.43 	63.72 	69.29 
1259 	64.43 	67.43 	63.88 
1585 	59.48 	64.67 	54.18 
1995 	59.55 	65.92 	52.50 
2512 	62.61 	64.38 	56.67 
3162 	56.64 	59.27 	52.40 
3981 	56.02 	58.49 	49.91 
5012 	50.01 	51.18 	46.08 
6310 	52.33 	49.75 	43.07 



