Question

A single sports fan is capable of yelling at an intensity level of 80 dB from a given distance. If 10,000 similar fans were all yelling from the same distance, which of the following would be closest to the observed intensity level?
A. 84 dB
B. 120 dB
C. 160 dB
D. 320 dB

Answer 1

Answer: option "A" is correct

Explanation: the closet to understand the intensity level will be from 80db (decibels) upwards. So option a which is 84db is the answer. Thank you.

Answer 2

Answer:

= 120dB

Explanation:

The Intensity level

$L = 10 Log \frac{I_1}{I_0}$ for sigle fan

so,

$I_1 = 10^8I_0$ single fan intensity

Now intensity for 10000 fan

$= 10^4 \times I_1 \\= 10^4 \times 10^8\\= 10^1^2I_0$

Intensity level

L = $10log\frac{I_1}{I_0}$

$L = 10log \frac{10^1^2I_0}{I_0}$

L = 120dB