Auditory Reaction Time Test

Fast answer: what this test measures

This is a five-round simple auditory reaction time test: instead of waiting for a panel to change color, you wait for a 1,000 Hz beep. Before timing starts you play a test tone and confirm you heard it, so a muted speaker or a silent iPhone switch can’t quietly corrupt your score. Each round waits a random 1.5–4.5 seconds, plays the beep, and times your click, tap, or spacebar press. Pressing early — or within 100 ms of the beep — is rejected as anticipation and retried; no response within 1,000 ms is treated as a missed tone. The headline result is the median of five valid rounds. Everything runs locally in your browser, and your score includes your audio device’s output latency on top of your biological response.

Two benchmarks: your number is not a textbook number

Auditory reaction time has two very different reference points, and mixing them up is the most common way people misread their score.

Your score here belongs to the second row. It is the sum of your nervous system’s response and your audio output path, input device, OS, and browser — and no web test can separate those parts from the outside. So don’t compare your number with the 140–160 ms lab figure and conclude you are slow; compare it with other sessions on the same setup, where a shifting median actually means something.

Why hearing beats sight

Auditory reactions are consistently faster than visual ones, and the reason is anatomical. Sound reaches the auditory cortex in roughly 8–10 ms, while a visual signal needs about 20–40 ms to reach the visual cortex — and the auditory pathway passes through fewer synaptic relay stages on the way. Across simple reaction tasks, studies typically find sound responses about 20–40 ms faster than sight (Hülsdünker et al., 2021).

That advantage is why sprinters react to a gun rather than a light, and why athletics treats a start under 100 ms after the gun as anticipation — see our world record fact-check for the full story. In a browser test, though, the physiological edge competes with your hardware: Bluetooth audio can add an estimated 150–250 ms of output latency, which is more than enough to erase it. Run the visual test on the homepage and this page on the same device to see your own gap in the comparison box below.

How much latency does your audio setup add?

The clock starts when the browser schedules the beep, but your reaction can only begin when the sound reaches your ear. Everything in between is output latency added to your score. The figures below are order-of-magnitude estimates from typical hardware behavior — not guarantees, and individual devices vary.

The practical rule is simple: test on speakers or wired headphones. A Bluetooth score is still valid as a measurement of that whole setup — just don’t compare it with a wired session or with anyone else’s hardware.

How we measure

The full protocol, calculations, and limitations are documented on the methodology page.

What this test is not

• Not a hearing test. It measures response speed to a tone you already confirmed hearing. It cannot measure hearing thresholds, screen for hearing loss, or evaluate a hearing aid — see an audiologist for that.
• Not a pure physiology reading. The 1 kHz stimulus sits in the speech frequency range, so mild high-frequency hearing loss usually has little effect on the score — but individual differences exist, and device latency affects everyone.
• Not comparable across audio setups. Speakers, wired, and Bluetooth each add different delay. Only same-setup sessions are meaningfully comparable.
• Not silent-switch proof. On iPhones the mute switch silences the beep in many browsers. If calibration is silent, flip the switch before assuming your reactions are slow.

Your hearing vs. your vision

Auditory reaction time FAQ

Is auditory reaction time faster than visual?

Yes, on average. Auditory signals reach the cortex in roughly 8–10 ms while visual signals take about 20–40 ms, and studies comparing simple reaction tasks typically find sound reactions about 20–40 ms faster than sight (Hülsdünker et al., 2021). In a browser test the gap can shrink or even reverse, because audio output latency — especially Bluetooth — is added to your sound score while display latency is added to your visual score.

What is a good auditory reaction time?

For an online browser test like this one, taken on speakers or wired headphones, a five-round median under about 220 ms is on the faster side and 220–300 ms is typical — orientation, not a ranking. Two anchors frame the range: a calibrated laboratory study put simple auditory reaction around 140–160 ms (Jain et al., 2015), while a large online sample measured a 241 ms mean once device latency was included (Madison et al., 2016). Your browser score lives in the second world.

Does Bluetooth audio affect my score?

Yes, heavily. Bluetooth audio adds output latency between the moment the browser schedules the beep and the moment it reaches your ear — an estimated 150–250 ms with the common SBC codec and roughly 40–80 ms with low-latency codecs like aptX LL (these are order-of-magnitude estimates, not guarantees). That delay is added directly to every round. For a meaningful score, test on speakers or wired headphones.

Is this a hearing test?

No. This page measures how quickly you respond to a 1,000 Hz tone that you have already confirmed you can hear — it says nothing about your hearing thresholds, and it cannot screen for hearing loss. The 1 kHz stimulus sits inside the speech range, so mild high-frequency hearing loss usually has little effect on the result, but individual differences exist. For any concern about your hearing, see an audiologist.

How does this auditory reaction test work?

First you calibrate: play the test beep and confirm you heard it clearly, which unlocks the test. Each round then waits a random 1.5–4.5 seconds and plays a 1,000 Hz tone; respond by clicking, tapping, or pressing the spacebar as fast as you can. Pressing before the beep, or within 100 ms of it, is rejected as anticipation and the round is retried; no response within 1,000 ms is treated as a missed tone. After five valid rounds your headline score is the median.

Why do I have to test the sound before starting?

Because a silent round is indistinguishable from a slow one. An iPhone mute switch, a muted tab, or audio routed to a disconnected Bluetooth device would otherwise produce missed rounds and inflated scores without you knowing why. The one-beep calibration confirms your sound path works before any timing happens — no competitor we reviewed does this, and it removes the most common source of bad auditory data.

Why does this test report the median instead of the average?

The median is the middle value of your five valid rounds, so one lucky fast round or one distracted slow round cannot drag the headline score the way it drags an average. The score card still shows your average, best, and spread alongside the median, so nothing is hidden.

What counts as a false start or a missed beep?

A press before the beep plays is a false start, and any response under 100 ms after the beep is also rejected — that is faster than a genuine auditory reaction, so it is anticipation, not response. Both cases retry the round instead of recording a number. At the other end, if 1,000 ms pass with no response, the round is treated as a missed tone: you are asked to check your volume and the round is retried.

Why is my auditory score different from my visual score on this site?

Two reasons. Physiology: sound reaches the cortex faster and through fewer relay stages than sight, so laboratory studies find auditory reactions roughly 20–40 ms quicker. Equipment: your audio output and your display add different latencies to the two scores, and Bluetooth audio can add enough delay to erase the natural advantage entirely. The comparison box above the FAQ shows your own visual-versus-auditory gap once you have taken both tests on this device.

Does this test work on a phone?

Yes — tap the panel instead of clicking. Two phone-specific cautions: on an iPhone the mute (silent) switch silences the beep for many browsers, so flip it off if the calibration beep is silent; and wireless earbuds add the same Bluetooth latency described above, so test on the speaker or wired earphones for a score you can compare over time.

Keep exploring

Run the five-round visual reaction time test to compare modalities on the same device, try the spacebar version to isolate input-device latency, check your result against average reaction time references, read the world record fact-check, practice with the 7-day training plan, or read the methodology behind every number on this site.