Detect the signal hidden in the noise · Gets harder each round
About Signal
Signal is a Flario original visual perception game. A faint shape appears briefly within a field of visual noise — you must identify what you saw before it vanishes. Was it a circle, a triangle, a square? The shape is genuinely faint and the noise is real, so Signal tests your visual signal detection ability rather than just your memory. Difficulty increases by making shapes fainter and noise denser. Signal is inspired by the scientific concept of signal detection theory, which underpins radar operation, medical imaging, and quality control.
How to Play
Watch the noisy screen carefully
A shape briefly appears hidden in static
Choose which shape you saw
Correct answers score points
Signal gets weaker each round
💡 Tips & Tricks
Look at the centre of the screen
Blink before each round
Trust your first instinct
🏆 Scoring
100 points plus 20 per round for correct answers. 3 mistakes ends the game.
Frequently Asked Questions
Is Signal available anywhere else?
No. Signal is a Flario original game. The visual perception mechanic and signal detection concept are unique to Flario's platform.
What is signal detection theory?
Signal detection theory is a scientific framework for measuring the ability to distinguish a meaningful signal from background noise. It is used in radar systems, medical diagnostics, and quality control. Signal the game applies this concept directly — you are the detector trying to identify the signal in the noise.
Why is the shape so hard to see?
The shape is intentionally faint and embedded in visual noise to make the task genuinely challenging. If the shape were obvious, the game would test memory rather than perception. The difficulty is calibrated so the shape is detectable but requires real focus.
How does difficulty change in Signal?
As you progress, shapes become fainter relative to the surrounding noise. The exposure time may also shorten. Both changes make the signal harder to extract from the noise field, requiring greater visual sensitivity.
What is a good strategy for Signal?
Relax your gaze rather than staring intently at the centre. Peripheral vision is often better at detecting faint shapes than direct focus. Try to look at the whole field at once rather than scanning for the shape.
Can Signal improve my visual perception?
Regular practice with perceptual tasks like Signal has been shown in research to improve visual sensitivity and the ability to detect low-contrast stimuli. This is relevant to activities like spotting hazards while driving, reading medical scans, or monitoring security footage.