A train whistle has a certain acoustic power if the sound
A train whistle has a certain acoustic power. If the sound energy from the whistle spreads out spherically, and the intensity level is measured to be 90 Db at a distance of 200 meter from the train, determine what is the power of the whistle?
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a train whistle has a certain acoustic power if the sound energy from the whistle spreads out spherically and the
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