At a rock concert, it is desired to have a sound intensity of 2.6 w/m2 for those patrons seated 25 m from the speakers. if you assume that the sound is emitted from the speakers equally in all directions, what is the power output needed from the sound system?

Power, P = 20.4 kW

Explanation:

It is given that,

Intensity of sound,

Distance from the speakers, r = 25 m

We need to find the power output needed from the sound system. Intensity is given by :

P = 20420.35 Watts

or

P = 20.4 kW

So, the power output needed from the sound system is 20.4 kW. Hence, this is the required solution.

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