1- 3/23/2011 in the NAB Blackbox, around 9 PM

2- The wind, the sleet and hail hitting the roof. Thunder.
3- The air conditioning system and the wind pushing the glass of the NAB against the building.
4- People chatting, someone typing on the cell phone. My computer fan.
5- The general sound level is low, but the occasional thunder is very loud for indoors.
6- Stormy
7- The rain, the thunder, and people chatting.