Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels F of their emissions are plotted in Fig. 17-40 versus the radial distance r from the sources. The vertical axis scale is set by β1 = 85.0 dB and β2 = 65.0 dB. What are (a) the ratio of the larger power to the smaller power and (b) the sound level difference at r = 10 m?
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