Asked by Mike
Residents of Hawaii are warned of the approach of a tsunami by sirens mounted on the tops of towers. Suppose a siren produces a sound that has an intensity level of 120 dB at a distance of 2.0 m. How far away can the siren be heard?
Answers
Answered by
Elena
r =2 m.
B = 120 dB = 10•log(I2/I1)
I2 =I1•10^12.
The siren can be heard until B = 0 or
10•logx = -120.
x=10^-12,
(2/r)² =10^-12
2/r = 10^-6,
r=2•10^-6 m.
B = 120 dB = 10•log(I2/I1)
I2 =I1•10^12.
The siren can be heard until B = 0 or
10•logx = -120.
x=10^-12,
(2/r)² =10^-12
2/r = 10^-6,
r=2•10^-6 m.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.