taraf intensitas 1 mesin ketik 20 db berapa taraf intensitas 10 mesin ketik

BUNYI

TI₁ = 20 dB
n = 10 → TI₁₀ = __?

TIₙ = TI₁ + 10 log n
TI₁₀ = 20 + 10 log 10
TI₁₀ = 20 + 10
TI₁₀ = 30 dB ✔️

1 mesin tik =20 db
berapa db jika 10 mesin tik?
1=20
10=10*20=200