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clc
clear
//Input data
P=1.5//The acoustic power produced by the loudspeaker in J/s
r=20//Distance in m
//Calculations
I=(P/(4*3.14*r^2))//Intensity of the sound produced by the loudspeaker in W/m^2
b=10*log10(I/10^-12)//Intensity level in dB
//Output
printf('The intensity level at a distance of %i m is %3.1f dB',r,b)
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