What is a 3D directional sound test?
This 3D sound test uses binaural audio to make a sound seem to come from in front of you, behind you, above, below or circling around your head – using ordinary stereo headphones. It is a quick way to check how well your headphones and your ears handle spatial audio, which matters for gaming (hearing footsteps), films and music mixed in 3D or "8D audio".
How to use it
- Put on stereo headphones or earbuds the right way round. Check first with our headphone test if you are not sure which side is which.
- Set a low volume and close your eyes.
- Press Circle around head. The sound should move smoothly in front of you, to your right, behind you and to your left.
- Try the single positions and see how many you can identify correctly.
How does 3D sound work in headphones?
Your brain locates sounds using small differences between your two ears: the sound reaches the nearer ear slightly earlier and louder, and the shape of your head and outer ear changes the tone depending on the direction. These changes are described by a head-related transfer function (HRTF). The test uses the browser's built-in HRTF panning, part of the Web Audio PannerNode, to add those cues to pink noise, so your brain hears it as coming from a point in space.
Why front and behind are hard to tell apart
Left and right are easy because the time and level differences between the ears are large. Front, behind, above and below rely mostly on subtle tone changes from the shape of the ear. A general HRTF is based on an average head, so for many people sounds "in front" seem to be inside the head or behind. This is normal and not a fault in your headphones. Games and apps with personalised spatial audio (such as head-tracked spatial audio on some earbuds) can do better.
What the result tells you
| What you hear | Meaning |
|---|---|
| Smooth circle, clear left and right | Headphones and channels work correctly |
| Circle goes the wrong way (left first) | Headphones are on backwards or channels are swapped |
| Sound jumps from ear to ear with no in-between | Mono audio may be on, or one channel is weak – see mono vs stereo |
| Everything sounds in the middle | Mono audio is on, or you are listening on speakers |
3D sound test for gaming headsets
Good directional hearing helps in shooters and battle royale games. If the circle sounds unclear, turn off extra "virtual surround" in your headset software and let the game's own 3D audio do the work, check that the headset is set to stereo in Windows sound settings, and make sure no equalizer is boosting the bass so much that it hides the high frequencies used for direction.
Supported devices and browsers
- Headphones requiredAny wired, USB or Bluetooth stereo headphones or earbuds.
- BrowsersChrome, Edge, Firefox and Safari on computers and phones.
- Not suitable forSingle speakers, phone speakers and soundbars – the 3D effect needs a separate signal for each ear.
Related tools
Headphone Test
Channels, phase, bass and frequency range for headphones and earbuds.
Start testHearing Age Test
High frequency hearing test with the mosquito tone – estimate your hearing age.
Start testSpeaker Test
Check left, right, stereo, bass, treble and run a full frequency sweep.
Start testFrequently asked questions
Is this the same as 8D audio?
"8D audio" songs use the same idea – panning and binaural effects that move music around your head. This test does it with a neutral sound so you can judge the effect clearly.
Why does the sound seem to be inside my head?
That is common with a generic HRTF. Sounds to the sides are usually clear; front and back are harder. Try different headphones – open-back models often give a wider sense of space.
Does it work on speakers?
Only partly. Binaural cues need each ear to hear only its own channel, which speakers cannot do because both ears hear both speakers.
Can this test my hearing?
No. It is a headphone and spatial audio check. If you have trouble telling directions apart in everyday life, see a hearing professional.