Question

A sound source is generating 180 W of sound energy in all directions. A person is moving toward the source at 0.40 m/s. When he is 50 m away,

a. What is the intensity of sound in dB?

b. What is the rate at which the intensity of sound is increasing in dB/s?

Answer #1

when the observer is moving, the observed frequency is

taking V=340m/s

N_{2} = ((340.4)/340)N_{1}

Since Power P = K N^{2 }

Hence power

Now Intensity I = Power/ Area

Lets go ahead and assume that we have a sound source is
generating 180 W of sound energy that is going in all directions.
And also lets say that there is a women that is moving toward the
source at 0.40 m/s. When she gets right to 50 m away,
a. What is the intensity of sound in dB?
b. What is the rate at which the intensity of sound is
increasing in dB/s?

Lets go ahead and assume that we have a sound source is
generating 180 W of sound energy that is going in all directions.
And also lets say that there is a women that is moving toward the
source at 0.40 m/s. When she gets right to 50 m away,
a. What is the intensity of sound in dB?
b. What is the rate at which the intensity of sound is
increasing in dB/s?

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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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