Answer
The proof is below.
Work Step by Step
We use the equation for the sound intensity level to find:
$ \beta = 10log(\frac{I}{I_0})$
Thus, we find:
$ \beta = 10log(\frac{2I}{I})$
$ \beta = 10log(2)$
$ \beta \approx 3$
Essential University Physics: Volume 1 (3rd Edition)
by Wolfson, Richard
Published by
Pearson
ISBN 10:
0321993721
ISBN 13:
978-0-32199-372-4
Chapter 14 - Exercises and Problems - Page 263: 63
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