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TI₁=40 dB
r₁=4 m
r₂=40m
Ditanyakan: TI₂=...dB
Dijawab:
Rumus:
TI₂=TI₁+20 log(r₁/r₂)
TI₂=40 dB+20log(4/40)
TI₂=40+20log10⁻¹
TI₂=40+20(-1)
TI₂=40-20
TI₂=20 dB
Jawabannya E.