Home▸Perception & Optical Illusions▸Stage Voice Projection Lab: 2D Floor Plan

🎭 Stage Voice Projection Lab: 2D Floor Plan

Drag an actor across a theatre stage and see how voice level, directivity, hall reverberation and audience noise decide who can understand the speech.

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

Details

CategoryPerception & Optical Illusions

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsDrag the actor and the cyan facing handle, click any seat to inspect its level, STI and signal-to-noise; sliders for voice level, directivity, facing, hall absorption, ceiling height and audience noise; six scenarios; switch seat colouring between STI, dB SPL and direct-to-reverberant ratio; pause and step the slow-motion wavefronts.

theatreactingvoice projectionroom acousticsspeech intelligibilityreverberation

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⚙ Under the hood

Interactive floor plan of a 360-seat theatre: drag the actor and turn their facing, and watch the seats recolour by speech intelligibility (STI), sound level or direct-to-reverberant ratio, driven by direct sound, Sabine reverberation and audience noise.

theatreactingvoice projectionroom acousticsspeech intelligibilityreverberation

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