Reaction Time Test
Difficulty: Easy
How fast do you react to a visual signal?
Start TestHuman Performance Test
Audio Reaction Test
Wait for the sound. Press SPACE as soon as you hear it — five rounds.
- 1.Turn your volume up and use the sound check below.
- 2.Press Start Test, then wait silently for the beep.
- 3.Hit SPACE or TAP the instant you hear it. Five rounds decide your score.
Personal Best: —
Not sure your sound works?
Why hearing beats seeing
Sound reaches the brain's response centres through fewer synapses than vision: the auditory pathway runs ear → brainstem → motor areas, while visual signals detour through the visual cortex first. The saving is typically 20–40 ms, which is why sprinters react to the starting gun and not a lamp — and why your score here should beat your visual test by a similar margin. If it does not, suspect Bluetooth audio latency, which can add 100–250 ms and silently wreck the measurement. Wired earbuds or speakers give the honest number.
Getting a fair audio score
- Run the sound check first and set a comfortable, clearly audible volume.
- Avoid Bluetooth audio for record attempts — use wired output.
- Rest your finger on SPACE and keep background noise low.
- Do not anticipate the beep; the 1.5–5 second window punishes guessers with Too Soon restarts.
- Compare all five rounds, not your luckiest one — the average is the score.
FAQ
Audio reaction FAQ
How does the audio reaction test work?
Each round waits a random 1.5–5 seconds, then plays a short beep generated with the Web Audio API. Timing starts exactly when the sound plays and stops when you press SPACE or tap.
Do I need sound on?
Yes for the real test — use the sound check button first. A visual flash fires at the same moment as a fallback so the test still works silently.
Are audio reactions faster than visual?
Usually yes. Auditory stimuli skip some visual processing, so most people score 20–40 ms faster than on the visual test.
Does Bluetooth delay my score?
Yes — Bluetooth audio commonly adds 100–250 ms of latency. Use wired earbuds or speakers for an honest measurement.
What if I am hard of hearing?
A visual flash fires at the exact moment of the beep as a fallback, so the test still runs — treat that score as a visual result, not an audio one.
How this test works
- Why Your Browser Score Is Slower Than a Laboratory OneThe same task, measured two ways, produced a 65 ms gap in published work. That difference is larger than most effects people test for — here is where it comes from.8 min read
- What Is a Good Reaction Time? (ms Benchmarks for Online Tests)Under 250 ms is quick and under 200 ms is genuinely fast on a browser reaction test. See the full scale, why device lag matters, and how to get a fair score.7 min read
More human performance tests
Reaction Speed Test
Difficulty: Medium
Click only the target shape among decoys.
Start TestClick Speed Test
Difficulty: Easy
Click as fast as you can in 5 seconds.
Start TestCPS Test
Difficulty: Easy
Measure your clicks per second.
Start TestTyping Speed Test
Difficulty: Medium
Check your WPM and accuracy.
Start TestAim Trainer
Difficulty: Medium
Hit moving targets for 30 seconds.
Start TestMemory Test
Difficulty: Medium
Remember the highlighted squares.
Start TestNumber Memory Test
Difficulty: Medium
How many digits can you hold?
Start TestVisual Memory Test
Difficulty: Hard
Reproduce the grid pattern.
Start TestSequence Memory Test
Difficulty: Medium
Repeat the growing sequence.
Start TestSpacebar Speed Test
Difficulty: Easy
Hammer SPACE as fast as you can.
Start TestMouse Test
Difficulty: Varies
Accuracy, double-click and precision.
Start TestKeyboard Test
Difficulty: Easy
Are all your keys working?
Start TestChoice Reaction Test
Difficulty: Hard
Right key for the right color.
Start Test