taraf intensitas sebuah sumber bunyi adalah 60 db hitunglah besar taraf intensitas 80 sumber bunyi sejenis yg di bunyikan bersama sama jika log2=0,3

BUNYI
• TI

n = 1 → TI = 60 dB
n' = 80 → TI' = ___?

TI' = TI + 10 log (n'/n)
TI' = 60 + 10 log (80/1)
TI' = 60 + 10 log (10×8)
TI' = 60 + 10 (log 10 + log 8)
TI' = 60 + 10 (1 + log 2³)
TI' = 60 + 10 (1 + 3 log 2)
TI' = 60 + 10 (1 + 3 × 0,3)
TI' = 60 + 10 × 1,9
TI' = 60 + 19
TI' = 79 dB ← jwb