16 cars in a circle at a boom box competition produce a 140 dB sound intensity level at the center of the circle. What is the average sound intensity level (in dB) produced there by each stereo, assuming interference effects can be neglected?

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Interference of sound

Seiche

A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.