Measure your raw response time to auditory stimuli. This test uses the high-precision Web Audio API to bypass audio player buffer delays, offering true millisecond-level audio reflex measurement.
Click inside the card to begin. Wait for the audio beep, and react the exact instant you hear the tone.
The sound reaction test measures how quickly your motor system executes a movement in response to an auditory cue. When you hear the high-frequency beep tone emitted by the browser, your auditory system captures the wave, routes it to the brainstem and primary auditory cortex, which triggers the motor signal down to your finger to click or tap.
For most humans, auditory reaction times are consistently **30 to 50 milliseconds faster** than visual reaction times. This is a physiological difference rooted in how our sensory organs process inputs:
While a normal visual reaction average is roughly 250ms, a typical auditory reaction average sits between **160ms and 190ms**.
Your choice of audio hardware dictates the accuracy of your results:
Wireless Bluetooth codecs (AAC, SBC, AptX) compress and buffer audio signals. This adds an unavoidable delay of **100ms to 300ms** to your score. A reaction time of 150ms could show up as 400ms on Bluetooth earbuds.
Wired headphones (3.5mm jack or USB-C) and native laptop speakers route analog signals instantly, adding less than **1ms** of hardware latency to your assessment.
Standard sites load static audio files (.mp3 or .wav), which require browser media players to buffer and spin up decoding threads. We utilize the native browser **Web Audio API** to synthesize a raw 750Hz sine wave directly on the main thread, reducing buffer latency to nearly 0ms.
Anything below 150ms is elite. 150ms to 180ms is excellent and typical of esports athletes and musicians. 180ms to 220ms is average, and above 250ms indicates attention fatigue or hardware lag.