4. Convert the following octave band measurements to an equivalent A-weighted sound level. Band center frequency (Hz) Band level (dB) 31.5 78 63 76 125 78 250 82 500 81 1,000 80 2,000 80 4,000 73 8,000 65 TABLE 10-1 Sound level meter network weighting values Frequency (Hz) Curve A (dB) Curve B (dB) Curve C (dB) 10 -70.4 -38.2 -14.3 12.5 -63.4 -33.2 -11.2 16 -56.7 -28.5 -8.5 20 -50.5 -24.2 -6.2 25 -44.7 -20.4 -4.4 31.5 -39.4 -17.1 -3.0 40 -34.6 -14.2 -2.0 50 -30.2 -11.6 -1.3 63 -26.2 -9.3 -0.8 80 -22.5 -7.4 -0.5 100 -19.1 -5.6 -0.3 125 -16.1 -4.2 -0.2 160 -13.4 -3.0 -0.1 200 -10.9 -2.0 0 250 -8.6 -1.3 315 -6.6 -0.8 0 400 -4.8 -0.5 500 -3.2 -0.3 0 630 -1.9 -0.1 800 -0.8 1,000 0 0 0 1,250 0.6 0 0 1,600 1.0 0 -0.1 2,000 1.2 -0.1 -0.2 2,500 1.3 -0.2 -0.3 3,150 1.2 -0.4 -0.5 4,000 1.0 -0.7 -0.8 5,000 0.5 -1.2 -1.3 6,300 -0.1 -1.9 -2.0 8,000 -1.1 -2.9 -3.0 10,000 -2.5 -4.3 -4.4 12,500 -4.3 -6.1 -6.2 16,000 -6.6 -8.4 -8.5 20,000 -9.3 -11.1 -11.2