Question

the ratio of intensites between two coherent sound source is4:! .the difference of loudness in desibel (db) betwwen maximum and minimum intensities when they interfere in space is

Answer 1

I IS DIRECTLY PROPORTIONAL TO A^2
GIVEN
I1/I2=4/1
A1/A2=√4/√1=2/1
Amax/Amin=A1 +A2 ÷A1-A2=2+1/2-1=3/1
Imax÷Imin=(Ama)^2/(Amin)^2
=9/1
WE KNOW THAT
IL2-IL1=10 LOG Imax÷Imin
=10log9/1
=10log3^2
=20log3

Answer 2

Please find the explanation attached. ..