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diff --git a/Engineering_Physics_by_U_Mukherji/5-Acoustics.ipynb b/Engineering_Physics_by_U_Mukherji/5-Acoustics.ipynb new file mode 100644 index 0000000..1867012 --- /dev/null +++ b/Engineering_Physics_by_U_Mukherji/5-Acoustics.ipynb @@ -0,0 +1,162 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 5: Acoustics" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 5.1: find_absorption_coefficient.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//chapter5,Example5_1,pg 97\n", +"\n", +"T1=1.5\n", +"\n", +"T2=1\n", +"\n", +"A=20\n", +"\n", +"V=10*8*6\n", +"\n", +"a=((0.161*V)/(2*A))*((1/T2)-(1/T1))\n", +"\n", +"printf('absorption coefficient\n')\n", +"\n", +"printf('a=%.3f Sabines',a)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 5.2: find_area_of_wall_covered_by_curtain.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//chapter5,Example5_2,pg 97\n", +"\n", +"V=3000\n", +"\n", +"T1=3.5//reverberation time\n", +"\n", +"A=(0.161*V)/T1\n", +"\n", +"l=20\n", +"\n", +"b=15\n", +"\n", +"h=10\n", +"\n", +"S=2*((l*b)+(b*h)+(h*l))\n", +"\n", +"sum_a=A/S\n", +"\n", +"am=0.5\n", +"\n", +"a=0.106\n", +"\n", +"T2=2.5//reverberation time after cloth use\n", +"\n", +"S1=(((0.161*V)/(am-a))*((1/T2)-(1/T1)))\n", +"\n", +"printf('area of wall covered by curtain cloth\n')\n", +"\n", +"printf('S1=%.3f sq.m',S1)" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 5.3: find_reverberation_time.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"//chapter5,Example5_3,pg 98\n", +"\n", +"V=1450\n", +"\n", +"A1=112*0.03//absorption due to plastered wall\n", +"\n", +"A2=130*0.06//absorption due to wooden floor\n", +"\n", +"A3=170*0.04//absorption due to plastd. celing\n", +"\n", +"A4=20*0.06//absorption due to wooden door\n", +"\n", +"A5=100*1//absorption due to cushioned chairs\n", +"\n", +"sum_as=A1+A2+A3+A4+A5\n", +"\n", +"T1=(0.161*V)/sum_as//reverberation time case-1\n", +"\n", +"T2=(0.161*V)/(sum_as+(60*4.7))//persons=60,A=4.7 case-2\n", +"\n", +"T3=(0.161*V)/(sum_as+(100*4.7))//seat cushioned=100 rev. case-3\n", +"\n", +"printf('rev. time for case-1\n')\n", +"\n", +"printf('T1=%.3f sec',T1)\n", +"\n", +"printf('\nrev. time for case-2\n')\n", +"\n", +"printf('T2=%.3f sec',T2)\n", +"\n", +"printf('\nrev. time for case-3\n')\n", +"\n", +"printf('T3=%.3f sec',T3)" + ] + } +], +"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 +} |