Home▸Perception & Optical Illusions▸Theatre Acoustics, Light and Sightlines: 2D Plan

🎭 Theatre Acoustics, Light and Sightlines: 2D Plan

Top-down plan of a theatre stage and raked audience: drag two actors and turn them, and watch voice level, speech intelligibility, stage-light illuminance and face legibility change seat by seat, using room-acoustics (Sabine, Peutz ALcons) and inverse-square lighting formulas.

Perception & Optical Illusions2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategoryPerception & Optical Illusions

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsSliders for voice level, projection, audience noise, wall absorption, spot intensity and beam angle, ambient light and facing; presets for whisper, declamation, back to audience and reverberant hall; drag actors and their facing handles, tap seats to probe them, pick the seat heat-map metric.

theatreroom acousticsspeech intelligibilitystage lightingperception

Related simulations

Motion AftereffectStare at a rotating spiral for 20 seconds (adaptation phase), then stop — the static spiral…

Colour Contrast IllusionsThree classic colour perception illusions: simultaneous lightness contrast, Mach bands at…

Optical Illusions — Visual Perception GalleryInteractive gallery of 8 classic optical illusions: Müller-Lyer, Ebbinghaus, Café Wall,… ⊞ All 183 in Perception & Optical Illusions →

⚙ Under the hood

theatreroom acousticsspeech intelligibilitystage lightingperception

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install