일반물리학 1 — Waves-II: Problem 14

14 Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels \(\beta\) of their emissions are plotted in Fig. 17-25 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 \(r = 23 \text{ m}\)?