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• For enforcement purposes, would you need to wait for the cars to be absent to obtain a more accurate reading of the music noise level? Yes. • Could the ambient noise level alter your perception of how obtrusive the music noise is? Yes, if the ambient noise is louder, then the music would generally be less obtrusive to someone. • If the noise outside is at 70 dBA at the property line, and if residents have windows closed and are watching TV, will they hear it? It depends on how loud the TV is. The building would usually provide a 25 dBA reduction. You may be able to feel the beat (vibrations) even if cannot hear the sounds. Do atmospheric conditions affect the sound? Yes, wind and temperature gradient do. If there is an inversion (hotter as you go up) sound can travel really far. Would sound travel more in the summer (when it's warmer) than the winter? Yes, if there is an inversion, at certain times of the day. As well, people have their windows open and they are outside so they may hear more noise. How accurate are i -Phone apps for sound monitoring? They are not that far off of regular decibel meters for mid -level ranges (50 -70 dBA); they are not very accurate at low levels. Second Location After about 20 minutes, the group traveled to the parking lot behind Redcoats British Pub and Restaurant on the east side of Peters Avenue. The noise level behind Fernando's Mexican Restaurant from patrons talking was ranged between 56 -66 dBA. Staff then set up a noise demonstration using a boom box to create 70 dBA at the property line. The sound level across the street (on the west side of Peters Avenues) at the property line of several residences was measured at approximately 59 -60 dBA. Another reading was taken at the fence line of a property approximately 60 feet farther into the residentially zoned district, registering between 50 -59 dBA. PLANNING COMMISSION MINUTES, October 24, 2012 Page 6 of 7