Years ago, when I was at university, I did an experiment/exercise whereby I recorded the same street corner for 5 minutes every hour on the hour for 24 hours. The initial idea was to string a minute of each recording together into a 24 minute sound scape of a city over a 24 period. Around 3am, I started to notice a dramatic change in the sonic landscape of the city. I eventually discovered, at 4am that the quietest moment in my area of the city was around 4am. The silence only broken subtlely by the hum of the city under the roads, the buzz of electrical wires etc. It was soon broken about 10 minutes later by the chirping of birds. But it was amazing to experience, what I believe, to be the quietest moment in my town.
What about your areas? Have any of you fellow SSD's ever experienced such a phenomenon? Please share.