A person is talking in a small room and the sound intensity level is `60dB` everywhere within the room. If there are eight people talking simultaneously in the room, what is the sound intensity level?A. `60dB`B. `69dB`C. `74dB`D. `81dB`

A person is talking in a small room and the sound intensity level is `

1.	A person is talking in a small room and the sound intensity level is `60dB` everywhere within the room. If there are eight people talking simultaneously in the room, what is the sound intensity level?A. `60dB`B. `69dB`C. `74dB`D. `81dB`
Answer» Correct Answer - B Let intensity due to a single person `=I` then `10log I//I_0=60` Also, intensity due to 8 person `=8I` final decibel level `=10log.((8I)/(I_0))=10(log.(I)/(I_0)+log8)` `=60+10log8=60+30log2=60+30(.3010)` `=69dB`

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A person is talking in a small room and the sound intensity level is `60dB` everywhere within the room. If there are eight people talking simultaneously in the room, what is the sound intensity level?A. `60dB`B. `69dB`C. `74dB`D. `81dB`

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