Most noise apps play flat stereo. Quilence places sound around you in 3D space using HRTF processing, with dynamic Head Tracking on AirPods Pro and Max.
Download Free — Experience 3D SoundFree 7-day trial • No credit card required
Sound spread across 3D space puts less pressure on your ears than flat stereo pumped straight into the ear canal. You can listen longer without fatigue.
With AirPods Pro or AirPods Max, Quilence tracks your head movement. Turn your head and the sound stays put, like it's coming from a fixed point in the room.
Sound from multiple directions engages more of your auditory cortex than flat stereo. Many users find they can mask the same noise at a lower volume.
HRTF Spatial Audio works with any headphones or earbuds. Head Tracking requires AirPods Pro, AirPods Max, or Beats Fit Pro.
Each layout positions the 10 frequency bands differently in 3D space. Choose the one that feels right, or create your own custom positioning.
All 10 frequency bands distributed evenly in a circle around you. A good starting point if you're new to spatial noise.
Modeled after traditional 5.1 surround sound positioning. If you know what surround sound feels like, this will be familiar.
Bands concentrated in a forward arc. Useful when you want sound to feel like it's coming from your workspace, not behind you.
Extra-wide left-right spread. Makes the sound field feel bigger than your head.
Sound coming from everywhere: above, below, all sides. People who want total isolation tend to pick this one.
Tuned specifically for headphone listening with precise inter-aural timing differences. The most technically accurate spatial rendering.
Bass frequencies behind you, treble in front. Creates a unique depth perception where low rumble surrounds while highs stay focused.
All bands positioned behind you. Some people find this calming for sleep because the sound feels like it's receding.
All bands centered, no spatial processing. Regular stereo playback.
Your brain determines where sounds come from by processing tiny differences in timing and frequency between your left and right ears. A sound arriving from the left reaches your left ear a fraction of a millisecond before your right — and your pinna (outer ear) filters the frequencies differently depending on the angle. This is how you can locate a voice in a crowded room without turning your head.
HRTF (Head-Related Transfer Function) captures these natural filtering patterns and applies them digitally to headphone audio. Instead of simple left-right panning, HRTF simulates the full 3D spatial experience — including sounds above, below, in front, and behind you.
For noise applications, this matters because spatial distribution reduces perceived loudness and ear fatigue. When sound comes from multiple directions rather than being pressed directly into the ear canal, it feels more natural and less intrusive. Many users report being able to listen at lower volumes while maintaining the same masking effectiveness — which is better for long-term hearing health.
With supported AirPods, Quilence adds dynamic Head Tracking using the headphones' built-in gyroscope and accelerometer. As you turn your head, the sound field stays anchored in space — the same technology Apple uses for spatial audio in Apple Music and Apple TV+, now applied to noise masking.
HRTF (Head-Related Transfer Function) simulates how sound reaches your ears from different positions in 3D space. In Quilence, each frequency band is positioned at a specific location around you, creating an immersive environment through any headphones.
No. HRTF Spatial Audio works with any headphones or earbuds. Dynamic Head Tracking — where sound stays in place as you move — requires AirPods Pro, AirPods Max, or Beats Fit Pro.
Many users find it more effective because it creates an enveloping sound field rather than pressing sound directly into the ears. The Cocoon and Behind layouts are particularly popular for sleep.
Yes. Beyond the 9 preset layouts, you can manually drag individual frequency bands to custom 3D positions — placing bass behind you and treble in front, for example.
The HRTF processing adds minimal overhead. Battery usage with Spatial Audio enabled is comparable to standard playback.
Free 7-day trial. The difference is obvious within seconds.
Download on App StoreAlso explore: