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D=10 log (P1/P2) Where the values of P1 and P2 are expressed in the same units, such as watts
(w). If P2 = 75 w, find the value of P1 at which D=0.7
Solution
D = 10 log ( P1 / P2 )
P2 = 75
D = 0.7
0.7 = 10 log ( P1 / 75 )
dividing both sides by 10
0.7 / 10 = log ( P1 / 75 )
0.07 = log ( P1 / 75 )
10^0.07 = P1 /75
P1 = 10^0.07* 75
P1 = 88.12

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D=10 log (P1P2) Where the values of P1 and P2 are expressed in the .pdf

  • 1. D=10 log (P1/P2) Where the values of P1 and P2 are expressed in the same units, such as watts (w). If P2 = 75 w, find the value of P1 at which D=0.7 Solution D = 10 log ( P1 / P2 ) P2 = 75 D = 0.7 0.7 = 10 log ( P1 / 75 ) dividing both sides by 10 0.7 / 10 = log ( P1 / 75 ) 0.07 = log ( P1 / 75 ) 10^0.07 = P1 /75 P1 = 10^0.07* 75 P1 = 88.12