I wanted to understand these echoes better, so I developed a program that would model the way sound travels through a space and bounces off of the walls. In the image above, starting from the top left and going down each column, it starts with a circle of sound expanding from its source. If a sound starts at the location, it gets sent back and forth across the archway, creating the echoes.
These images were created with a program developed in Processing. This project is part of a larger goal of finding elegant ways to visualize the acoustics of different spaces, so that they may be better understood and more confidently worked with as a medium for installations or architecture. Reflection Patterns was another approach to this issue.
As a sidenote, the design of my logo came out of earlier studies like this.
Update: The acoustics in this bridge have since disappeared, sadly. Some construction work somehow disrupted them. I know for a fact that the people working on it where not insensitive to the echoes, they just turned out to be very fragile.