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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 11: Architectural Acoustics"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.1: calculation_of_total_absorption_and_average_absorption_coefficient.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;clear;\n",
+"//Example 11.1\n",
+"//calculation of total absorption and average absorption coefficient\n",
+"\n",
+"//given values\n",
+"\n",
+"V=20*15*5;//volume of hall in m^3\n",
+"t=3.5;//reverberation time of empty hall in sec\n",
+"\n",
+"\n",
+"//calculation\n",
+"a1=.161*V/t;//total absorption of empty hall\n",
+"k=a1/(2*(20*15+15*5+20*5));\n",
+"disp(k,'the average absorption coefficient is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.2: calculation_of_average_absorption_coefficient.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;clear;\n",
+"//Example 11.2\n",
+"//calculation of average absorption coefficient\n",
+"\n",
+"//given values\n",
+"\n",
+"V=10*8*6;//volume of hall in m^3\n",
+"t=1.5;//reverberation time of empty hall in sec\n",
+"A=20;//area of curtain cloth in m^2\n",
+"t1=1;//new reverberation time in sec\n",
+"\n",
+"//calculation\n",
+"a1=.161*V/t;//total absorption of empty hall\n",
+"a2=.161*V/t1;//total absorption after a curtain cloth is suspended\n",
+"\n",
+"k=(a2-a1)/(2*20);\n",
+"disp(k,'the average absorption coefficient is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 11.3: calculation_of_average_absorption_coefficient_and_area.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;clear;\n",
+"//Example 11.3\n",
+"//calculation of average absorption coefficient and area\n",
+"\n",
+"//given values\n",
+"\n",
+"V=20*15*10;//volume of hall in m^3\n",
+"t=3.5;//reverberation time of empty hall in sec\n",
+"t1=2.5;//reduced reverberation time \n",
+"k2=.5;//absorption coefficient of curtain cloth\n",
+"//calculation\n",
+"a1=.161*V/t;//total absorption of empty hall\n",
+"k1=a1/(2*(20*15+15*10+20*10));\n",
+"disp(k1,'the average absorption coefficient is');\n",
+"a2=.161*V/t1;//total absorption when wall is covered with curtain\n",
+"a=t1*(a2-a1)/(t1*k2);\n",
+"disp(a,'area of wall to be covered with curtain(in m^2)is:')"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}