The Doppler City

How to Play

• Draw roads by clicking/dragging on the grid. Vehicles will automatically spawn and drive along connected roads.
• Place buildings to block and reflect sound waves, creating quiet zones behind them.
• Place barriers (noise walls) for targeted sound dampening along roads.
• Drop a listener to measure the perceived Doppler-shifted sound at a specific point.
• Vehicles produce sound that radiates outward. Moving vehicles exhibit the Doppler effect - higher pitch approaching, lower pitch receding.
• Sound reflects off buildings and barriers, creating echoes in urban canyons.
• Goal: design a city layout that keeps residential areas quiet while managing traffic flow.

Keys: 1-5 select tools, Space pause, A toggle audio, R toggle rays