Question

In 79 C.E., Mount Vesuvius erupted in Pompeii, Italy. Though this is perhaps the most famous volcanic eruption, the event only had one known surviving witness. Pliny the Younger was in Miseno, about 28 km across the bay, when the eruption occured. Given that a typical volcanic eruption produces a sound level of 157 dB from 1 km away, what sound level would Pliny have heard from Miseno? dB

Answer 1

Criven that, &i=1km Il = 157dB 82 = 28 km The intensity level is guon as, O IL = lologio) Jo is standaard II = I 2 I 2 = I want o relesene Ques Forom , 157= 10 10910 (1 109,0 ( 2 ) = 15 - 1070 I2 = ( 2 ) Il2 = 1010310 (1) Il2 = 10103101 (PE) Il2 = 1010310 (68) X 1069/0)dB F 10 109 10 (0.001275FOLX10's) = 10 X 128055 = 128.05 dB