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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 2: Acoustics Of Buildings"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.10: example_10.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"clear all;\n",
+"v=45*100*17.78;//in m^3\n",
+"absorp1=(700*0.03)+(600*0.06)+(400*0.025)+(600*0.3);\n",
+"absorp_p=600*4.3;\n",
+"T1=(0.16*v)/(absorp1);//Reverbaration time (empty hall) \n",
+"T2=(0.16*v)/(absorp_p+absorp1);//Reverbaration time with full capacity\n",
+"disp(+'second',T1,'Reverbaration time (empty hall) =');\n",
+"disp(+'second',T2,'Reverbaration time with full capacity =');\n",
+"//There is slight variation in answer than book's answer..verified in calculator too.(mistake in textbook)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.1: example_1.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//delta_L=L2-L1\n",
+"//I proportional to square of amplitude so when amplitude is doubled intensity will becomes 4 times \n",
+"//L1=10*l0g10(I1/I0)\n",
+"//L2=10*log10(I2/I0)\n",
+"//delta_L=L2-L1\n",
+"//delta_L=10*log(I1/I0)-10*log(I2/I0)=10*log(I2/I1)\n",
+"I21=4;//I2/I1=4 because intensity=amp^2\n",
+"delta_L=10*log10(I21);//increase in intensity level\n",
+"disp(+'dB',delta_L,'increase in intensity level =')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.2: example_2.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//L2-L1=10*log10(I2/I1)\n",
+"//so , we can write that \n",
+"L2=40  //i dB\n",
+"L1=10 //in dB \n",
+"//where L1 and L2 are intensity level of two waves of same frequency\n",
+"L=L2-L1;\n",
+"//let I2/I1=I\n",
+"I=10^(L/10);\n",
+"//let a2/a1=a\n",
+"a=sqrt(I);//Ratio of their amplitudes \n",
+"disp(a,'Ratio of their amplitudes = ')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.3: example_3.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"clear all;\n",
+"I1=25.2 //in Wm^-2\n",
+"I2=0.90 //in Wm^-2\n",
+"B=10*log10(I1/I2) //Relative loudness of sound in dB\n",
+"disp(+'dB',B,'Relative loudness of sound = ')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.4: example_4.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"clear all;\n",
+"I=1e4 //in W/(m*m)\n",
+"I0=1e-12 //in W/(m*m)\n",
+"B=10*log10(I/I0);//intensity level\n",
+"disp(+'dB',B,'intensity level = ')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.5: example_5.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"B=5 // in dB\n",
+"//B=10*log(I2/I1)\n",
+"//let I2/I1=x\n",
+"//10*log(x)=5\n",
+"x=10^(5/10);\n",
+"disp('times more intense than the unamplified sound',x,'Amplified sound is')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.6: example_6.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"d=198; //in meter\n",
+"t=1.2;//in second\n",
+"//velocity=distance/time\n",
+"v=2*d/t;//velocity\n",
+"disp(+'m/s',v,'velocity =');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.7: example_7.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//need to find absorption coefficient\n",
+"V=5600 //in  m^3\n",
+"T=2 //in second\n",
+"s=700 //in m^2\n",
+"a=0.16*V/(s*T)\n",
+"disp(a,'absorption coefficient =')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.8: example_8.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"absorp1=92.90; //in m^^2\n",
+"absorp2=92.90;//in m^2\n",
+"V=2265.6;//in m^3\n",
+"T1=0.16*V/(absorp1);\n",
+"T2=0.16*V/(absorp1+absorp2);\n",
+"ans=T2/T1;//effect on Reverberation time\n",
+"disp(+'of its original value',ans,'Reverberation time will reduced to ')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 2.9: example_9.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"clear all;\n",
+"v=25.2*20.3*8.04 ;//in m^3\n",
+"T=0.75; //in second\n",
+"absorp1=500*0.3176 ;//in m^2\n",
+"absorp2=(0.16*v)/T;\n",
+"T1=(0.16*v)/(absorp1+absorp2);//reverbaration time\n",
+"disp(+'second',T1,'reverbaration time =');"
+   ]
+   }
+],
+"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
+}