2) A machine radiating an A-weighted sound power level of 84dB is installed in the centre of the floor of a room of dimensions 10m x 6m x 3m with an average boundary Sabine absorption coefficient of...

Extracted text: 2) A machine radiating an A-weighted sound power level of 84dB is installed in the centre of the floor of a room of dimensions 10m x 6m x 3m with an average boundary Sabine absorption coefficient of 0.15. Calculate the reverberant sound pressure level assuming the directivity factor = 0 and pc 414. Appendix -5 B and C -10 -15 B -20 Standard Filter -25 Contours -30 -35 A -40 -45 -50 20 50 100 200 500 1000 2000 5000 10k 20k Frequency (Hz) Graph SPL Weighting Frequency 31.5 63 125 250 500 1kHz 2kHz 4kHz 8kHz A -39.4 -26.2 -16.1 -8.6 -3.2 1,2 -1.1 weighted Correction -17 -9 -4 -1 -1 -3 Weighted correction -3 -0,8 -0.2 -0.2 -0.8 -3 Weighted Correction Table :Sound Pressure Level Weighting Correction factor Relative response (dB) 三。