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When playing a Fortissimo (very loudly) , a trumpet emits sound energy at rate of 0.738 W out of a bell(opening) of diameter 12.7 cm. a What is the sound intensity level right in front of the trumpet? B= ____________dB b If the trumpet radiates sound waves uniformly in all directions , what is the sound intensity level at a distance of 11.5m? B=____________dB

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