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Jawaban ada pada Lampiran.
TI1 =60 dB
R1= 1 m
R2= 100 m
Dit : TI2 = ...?
Peny :
TI2 = TI1 + 10.log (R1/R2)²
TI2 = 60 + 10 log (1/100)²
= 60 + 10.log (10^-2)²
= 60 + 10.log 10^-4
= 60 + 10. -4
= 60 - 40
= 20 dB