A speaker at an open-air concert emits 500 W of sound power,radiated equally in all directions.
Part A:
What is the intensity of the sound 6.8 m from of thespeaker?
Express your answer to two significant figures and include theappropriate units.
Part B:
What sound intensity level would you experience there if you didnot have any protection for your ears?
Express your answer using two significant figures. Units must bein (dB)
Part C:
Earplugs you can buy in the drugstore have a noise reductionrating of 23 decibels. If you are wearing those earplugs but yourfriend Phil is not, how far from the speaker should Phil stand toexperience the same loudness as you?
Express your answer to two significant figures and include theappropriate units.
