Question

The decibel level of the noise from a jet aircraft is 130 dB when measured 17.5 m from the aircraft.

(a) How much sound power does the jet aircraft emit?

W

(b) How much sound power would strike the eardrum of an airport
worker 17.5 m from the aircraft? (Use 1.9 ✕ 10^{-2} m as
the diameter of the ear.)

W

Answer #1

A 747 jumbo jet produces a 140 dB of noise when you are 15 m
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A new airport is being built 650 meters away from a school. The
noise level 50 meters away from planes that will land at the
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increases tenfold. How far away would the school have to be moved
to make the sound manageable? Give at least 2 options to reconcile
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E = 13.9 μJ
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(A) If the second student's eardrum has a diameter of d
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(B) In this problem take the speed of sound...

ONLY ANSWER IF YOU KNOW THE ANSWER TO ALL QUESTIONS !!!
OTHERWISE I WILL GIVE A THUMBS DOWN!!! PLEASE INCLUDE UNITS WHEN
ANSWERING!!! THANK YOU
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