Also interesting things like Whiteman AFB, from the recent stealth bomber post, shows nothing
Those maps are generated by publicly available data (traffic, railway schedules, etc). In the case of airports/airbases, the data are generated with radar flight tracks. Military flight track data are often redacted (presumably because they can leak aircraft performance data) so it's not surprising that modeled noise from stealth aircraft was not calculated.
The default view doesn't show rail traffic, which also seems to add a lot of heat to the map. I haven't quite understood what the map is based on, but it says 24-hr LAeq - is this a 24-hour average or 24-hour max?
