Does anyone know how to measure noise levels. I live in an condo and have a nieghbor who is always banging on the floor when ever I play my music/movie laud (in his opinion). I plan on following the city bylaw exactly which says I can make noise between 7 am and 10 pm at a certian dB (not exactly sure of what it is yet), but I want to play it at its max and have a way to measure and prove it. Is there any device which measures that?