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TI1 = 90 dB
n1 = 100 mesin
n2 = 10 mesin
Dit: TI2....?
TI2 = TI1 + 10 log n2/n1
TI2 = 90 + 10 log 10/100
TI2 = 90 + 10 log (10⁻¹)
T12 = 90 - 10
T12 = 80 dB
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maaf kalo salah...