Sony
Sony · Software · Filed May 23, 2025 · USPTO published Nov 12, 2026 · This week's release
Sony Files Patent for Cheaper, Realistic Game Audio Behind Walls and Obstacles
Ever noticed how game audio suddenly goes dull when you duck behind a wall? Sony has filed a patent application for simulating how sound really bends around edges, with a shortcut that keeps the math light enough to run live.
- Publication number
- US 2026/0362078 A1(US20260362078A1)
- Applicant
- Sony Group Corporation
- Filed · Published
- May 23, 2025 · Nov 12, 2026
- Inventors
- Koya Sato, Kazuki Sakai, Naoki Shinmen, Natsuko Maeda
- Status when we published
- Waiting for an examiner
- Document
- 22 claims
- US classification
- 381/303
- Examiner
- FAULK, DEVONA E (Art Unit 2618)
- Parent application
- National Stage Entry of PCT/JP2023/041352 (filed Nov 16, 2023)(PCTJP2023041352)
What Sony's muffled-sound simulation actually does
Imagine you're crouched behind a concrete pillar in a video game while a teammate shouts from the other side. In real life, that voice wouldn't just get quieter. It would bend around the pillar's edge and pick up a slightly hollow, muffled character that your ears recognize instantly.
Most games fake this with a simple dial that turns down the treble, which is why the sound can jump abruptly when your character steps behind something. Sony's filing describes a more physically accurate approach: actually simulating how sound waves wrap around an edge, but only for a short slice of time and a small patch of space, so a game console can keep up.
The big idea is to stop the heavy calculation the moment the bent sound has arrived, instead of working out the echo of the entire room.
searching a diffraction path from a sound source to a sound receiving point; and generating a diffracted sound acquired at the sound receiving point on a basis of a wave acoustic simulation with a simulation time constrained according to a distance of the diffraction path.
Translation: The system traces how sound bends around obstacles and calculates the resulting audio based on how far it has to travel.
How Sony shortens the sound-wave math
The method has two steps. First, the computer searches for the route sound takes from a source (say, a shouting teammate) to the listening point (your character's ears) when something blocks the straight line. Sound that bends around the edge of an obstacle is called diffracted sound.
Second, it generates that sound with a wave acoustic simulation (a physics calculation that treats sound as a wave rather than a beam), but cuts it short. The program works out when the bent sound first arrives by dividing the path length by the speed of sound. It then simulates only 1 to 5 times that arrival time. The description suggests about 2 times, preferably 3 or fewer, which is enough to catch the fine scattering at the edge.
The filing also describes shrinking the space. Instead of the whole virtual world, the simulation runs in a small subspace around the obstacle's edge, sized to what a machine can compute in one video frame (about 16 milliseconds at 60 frames per second). One worked example gives a sphere with a radius of about 1.36 meters.
The output is an impulse response (a sound fingerprint of that path) that gets blended with the original audio. A trained AI model or a pre-computed lookup table can stand in for the full simulation, and the work can be offloaded to a cloud server.
Why game worlds could sound less fake behind walls
If you play games or explore virtual worlds with headphones, the practical payoff is sound that behaves more like the real thing. The filing says the usual game audio tools fake obstacles with a simple filter that dulls high pitches, and that this can cause sudden, jarring changes as you move. A physics-based version could smooth that out.
The catch it is trying to solve is cost. Wave simulation gives better results but is normally too heavy to run while you play. By trimming the time and space it covers, and by offering shortcuts like lookup tables, a trained model or cloud processing, the filing aims to make realistic sound affordable on a game machine, tablet or PC. Sound designers could also adjust the results for dramatic effect.
Sony's 699th filing in our Sony coverage since May adds to a run that includes a voice-panic game helper and a shape-shifting digital ball.
Source: US 2026/0362078 A1 at the USPTO (PDF). Full patent text and figures are in the official publication.
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The drawings · 35 sheets
35 drawing sheets from US 2026/0362078 A1 · click any drawing to enlarge
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