Posted by **marinana** on Tuesday, May 31, 2011 at 5:13pm.

A student in the front row of a concert is at a distance of 2 m from the speaker. They hear the sound at 140dB. What is the sound intensity if the student walks 20 m away. What is the sound intensity at 2 m if there are 100 speakers at the same level at the same time instead of 1.

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