A person is talking in a small room and ...

A person is talking in a small room and the sound intensity level is 60dB everywhere within the room. If there ar eight people talking simultaneously in the room, what is the sound intensity level?

`60 dB`

`68 dB`

`74 dB`

`81 dB`

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RESONANCE ENGLISH-SOUND WAVES-Exercise- 1 PART - II

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