3D Audio & Surround Sound Test
Test your headphones' ability to reproduce spatial audio and positional sound. This tool uses HRTF technology to simulate sounds coming from different directions around you.
Status: Idle
🎧 Best with headphones: This test is designed for headphone use. Desktop speakers cannot accurately reproduce the "behind you" effect due to room acoustics and physical speaker placement.
What is 3D Spatial Audio?
3D spatial audio (also called binaural audio or immersive audio) is a technology that creates the illusion of sound coming from specific locations in three-dimensional space around the listener. Unlike traditional stereo, which only provides left and right channels, spatial audio can simulate sounds above, below, in front of, and behind you.
This is achieved using a technique called HRTF (Head-Related Transfer Function), which models how sound waves interact with your head, ears, and shoulders before reaching your eardrums. Your brain uses these subtle differences in timing, volume, and frequency to determine where a sound is coming from in the real world.
How to Use This Test
1. Put on headphones
Use over-ear or in-ear headphones for the best results. Make sure left and right earpieces are correctly positioned.
2. Click a direction
Press Front, Rear, Left, or Right to hear a test tone that appears to come from that direction relative to your head.
3. Try the 360° pan
The circle pan moves the sound smoothly around your head, demonstrating how spatial audio can create convincing directional movement.
4. Evaluate your gear
If you can clearly identify each direction, your headphones are capable of reproducing spatial audio content effectively.
What This Test Reveals
This test helps you understand how well your audio setup handles spatial positioning. Here's what to listen for:
- Left/Right separation: These should be very clear on any stereo headphones. If left sounds like it's coming from the right (or vice versa), your headphones may be on backwards.
- Front positioning: The sound should feel like it's in front of you, slightly elevated. This is often the clearest directional cue.
- Rear positioning: The hardest to reproduce. If the "rear" sound feels like it's behind your head, your headphones have good spatial imaging. If it sounds similar to "front," that's normal for basic headphones.
- Smooth panning: During the 360° test, the sound should move smoothly around your head without obvious jumps or gaps.
Why Test Spatial Audio?
Gaming
Competitive gamers rely on spatial audio to hear enemy footsteps and gunfire direction. Testing ensures your setup gives you a tactical advantage.
Movies & Music
Dolby Atmos and Sony 360 Reality Audio use spatial techniques. Verify your headphones can deliver the immersive experience these formats offer.
VR & AR
Virtual reality depends on convincing audio placement to maintain immersion. Poor spatial audio breaks the illusion of presence.
Limitations of Browser-Based 3D Audio
This test uses the Web Audio API's built-in HRTF panner, which provides a generic spatial model. Results will vary based on your individual ear shape and head size. Professional spatial audio systems use personalised HRTFs measured in anechoic chambers for more accurate results.
Additionally, some browsers implement spatial audio differently, so you may notice subtle variations between Chrome, Firefox, and Safari. For the most consistent experience, we recommend using Chrome or Edge.