initial commit / add all books

1 files changed, 36 insertions, 0 deletions

diff --git a/3755/CH14/EX14.2/Ex14_2.sce b/3755/CH14/EX14.2/Ex14_2.sce
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+clear

+//

+//

+//

+

+//Variable declaration    

+V=1500;      //volume(m^3)

+A1=112;      //area of plastered walls(m^2)

+A2=130;      //area of wooden floor(m^2)

+A3=170;      //area of plastered ceiling(m^2)

+A4=20;       //area of wooden door(m^2)

+n=100;     //number of cushioned chairs

+A5=120;    //area of audience(m^2)

+C1=0.03;    //coefficient of absorption in plastered walls

+C2=0.06;    //coefficient of absorption in wooden floor

+C3=0.04;    //coefficient of absorption in plastered ceiling

+C4=0.06;    //coefficient of absorption in wooden door

+C5=1.0;     //coefficient of absorption in cushioned chairs

+C6=4.7;     //coefficient of absorption in audience

+

+//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

+a4=A4*C4;    //absorption due to wooden door

+a5=n*C5;     //absorption due to cushioned chairs

+a6=A5*C6;    //absorption due to audience 

+aS=a1+a2+a3+a4+a5;       //total absorption in hall

+T1=0.165*V/aS;       //reverberation time when hall is empty(sec)

+T2=0.165*V/(aS+a6);    //reverberation time with full capacity of audience(sec)

+T3=0.165*V/((n*C6)+aS);    //reverberation time with audience in cushioned chairs(sec)

+

+//Result

+printf("\n reverberation time when hall is empty is %0.2f sec",T1)

+printf("\n reverberation time with full capacity of audience is %0.3f sec",T2)

+printf("\n reverberation time with audience in cushioned chairs is %0.2f sec",T3)