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   "source": [
    "# 13: Acoustics of Buildings and Acoustic Quieting"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Example number 1, Page number 13-14"
   ]
  },
  {
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   "execution_count": 4,
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "reverberation time of hall without audience is 3.9 seconds\n",
      "reverberation time of hall with audience is 1.963 seconds\n"
     ]
    }
   ],
   "source": [
    "#importing modules\n",
    "import math\n",
    "from __future__ import division\n",
    "\n",
    "#Variable Declaration\n",
    "A=92.9;          #absorption(m**2)\n",
    "V=2265;          #volume(m**3)\n",
    "\n",
    "#Calculation\n",
    "T1=0.161*V/A;        #reverberation time of hall without audience(seconds)\n",
    "T2=0.161*V/(A*2);    #reverberation time of hall with audience(seconds)\n",
    "\n",
    "#Result\n",
    "print \"reverberation time of hall without audience is\",round(T1,1),\"seconds\"\n",
    "print \"reverberation time of hall with audience is\",round(T2,3),\"seconds\""
   ]
  }
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