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clear
//
//
//
//Variable declaration
V=1200; //volume(m^3)
a1=220; //area of wall(m^2)
a2=120; //area of floor(m^2)
a3=120; //area of ceiling(m^2)
C1=0.03; //coefficient of absorption in wall
C2=0.80; //coefficient of absorption in floor
C3=0.06; //coefficient of absorption in ceiling
//Calculations
A1=a1*C1; //absorption due to plastered walls
A2=a2*C2; //absorption due to wooden floor
A3=a3*C3; //absorption due to plastered ceiling
aS=a1+a2+a3; //total absorption in hall
abar=(A1+A2+A3)/aS; //average sound absorption coefficient
AS=abar*aS; //total absorption of room(metric sabines)
T=0.165*V/AS; //reverberation time(sec)
//Result
printf("\n average sound absorption coefficient is %0.2f ",abar)
printf("\n reverberation time is %0.1f sec",T)
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