tuh yang no 5 gmana?? bgung

BUNYI
• TI

ra = 1 m. Ia = 10⁻⁷ W/m²
rb = 100 m.
TIa : TIb = __?

Taraf intensitas bunyi A
TIa = 10 log (Ia / Io)
TIa = 10 log (10⁻⁷ / 10⁻¹²)
TIa = 50 dB

Taraf intensitas bunyi TIb = TIb = TIa - 20 log (rb / ra)
TIb = 50 - 20 log (100/1)
TIb = 10 dB

Perbandingan taraf intensitas
TIa : TIb = 50 : 10
TIa : TIb = 5 : 1 ← jwb