Introduction to Dulles Airport Noise Footprint Simulator

(Notice: Because of new security measures with java applets, some browsers may filter out the java applet, so this page may not work for you. However, it stills works on Apple's OS 10.6.8 or eqivalent PC operating system.)

You initiate a flight out of Dulles International Airport by clicking the Take Off button. Flights move northward (10 deg) towards Asburn (default direction) until they reach the edge of the map, or until you click the Erase Flight button. Clicking the Erase Flight button twice resets the altitude to zero.

A flight is represented by the intersection of its noise bubbles with the surface of the earth.

You can adjust factors influencing surface sound by adjusting scrollbars at the right of the map. Dulles International "North Operations" is the default direction (shown as 10 degrees North). "South Operations" can be seen by adjusting the Direction scrollbar towards the right end to 190 degrees. Flights departing on Runway12/30 can be viewed by setting the Direction scrollbar towards the right side to 300 degrees. Showing what the sound footprint is for different types of aircraft can be seen by setting the Engine Noise scrollbar to the values shown below.

Another scrollbar - the Time Multiplier - adjusts the extent to which the simulation is faster than life. The pace can be set at real time by selecting a 1:1 multiplier.

Results are approximate since additional factors (like weather and sound frequency) affect how noise travels. Nevertheless the simulator provides insights concerning airplane noise, and what remedies would be most effective at a particular location.

This interactive aircraft noise simulator comes to you courtesy of David Heise, Professor Emeritus of Indiana University and Save Our Sky in Indianapolis, IN. SOS is now "off the air."

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