3 files changed, 30 insertions, 0 deletions
diff --git a/2381/CH15/EX15.1/ex_1.sce b/2381/CH15/EX15.1/ex_1.sce
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index 000000000..737fa2123
--- /dev/null
+++ b/2381/CH15/EX15.1/ex_1.sce
@@ -0,0 +1,9 @@
+//Example 1 // decibles
+clc;
+clear;
+close;
+//given data :
+i1=4;//assume
+i2=4*i1;//
+dl=10*log10(i2/i1);//db
+disp(dl,"decibles by which intensity level will decrease is,(db)=")
diff --git a/2381/CH15/EX15.2/ex_2.sce b/2381/CH15/EX15.2/ex_2.sce
new file mode 100755
index 000000000..2b27c8415
--- /dev/null
+++ b/2381/CH15/EX15.2/ex_2.sce
@@ -0,0 +1,11 @@
+//Example 2 // ratio of amlitudes
+clc;
+clear;
+close;
+//given data :
+l1=10;//db
+l2=40;//db
+dl=l2-l1;//db
+x=(10^(dl/10));//
+x1=sqrt(x);//
+disp(x1,"ratio of amplitudes is ,=")
diff --git a/2381/CH15/EX15.3/ex_3.sce b/2381/CH15/EX15.3/ex_3.sce
new file mode 100755
index 000000000..a1f493585
--- /dev/null
+++ b/2381/CH15/EX15.3/ex_3.sce
@@ -0,0 +1,10 @@
+//Example 3 // frequency
+clc;
+clear;
+close;
+//given data :
+x=264;//key note
+g=x*(3/2);//
+disp(g,"frequency of note G is ,=")
+cd1=x*2;//
+disp(cd1,"frequency of note C is ,=")