Answers: 1
![\beta_1 = 10 log_{10} [\frac{P_b}{P_a} ]](/tpl/images/0811/5625/e1c1a.png)
![\beta_2 = 10 log_{10} [\frac{P_c}{P_a} ]](/tpl/images/0811/5625/a8f88.png)
![\beta_1-\beta_2 = 10 log_{10} [\frac{P_c}{P_a} ]- 10 log_{10} [\frac{P_b}{P_a} ]](/tpl/images/0811/5625/98995.png)
![\beta = 10 log_{10} [\frac{P_c}{P_a} ]- 10 log_{10} [\frac{P_b}{P_a} ]= 1.3](/tpl/images/0811/5625/ceacc.png)
![\beta =10log_{10} [\frac{\frac{P_b}{P_a}}{\frac{P_c}{P_a}} ] = 1.3](/tpl/images/0811/5625/c013f.png)
![\beta =10log_{10} [\frac{P_b}{P_c} ] = 1.3](/tpl/images/0811/5625/83488.png)
![10log_{10} [\frac{P_b}{P_c} ] = 1.3](/tpl/images/0811/5625/87c7e.png)
![log_{10} [\frac{P_b}{P_c} ] = 0.13](/tpl/images/0811/5625/b342f.png)
![[\frac{P_b}{P_c} ] = 10^{0.13}](/tpl/images/0811/5625/09cfa.png)
![[\frac{52}{P_c} ] = 10^{0.13}](/tpl/images/0811/5625/86880.png)
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