Halliday, Resnick & Walker — Waves–II: Problem 34

Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels \(\beta\) of their emissions are plotted in Fig. 17.16 versus the radial distance \(r\) from the sources. The vertical axis scale is set by \(\beta_1 = 85.0 \text{ dB}\) and \(\beta_2 = 65.0 \text{ dB}\). What are (a) the ratio of the larger power to the smaller power and (b) the sound level difference at \(r = 10 \text{ m}\)?