Mixed Reality Spatial Audio Acoustic Simulation
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Solution Overview
Problem
Existing technologies for presenting audio in mixed reality environments fail to accurately simulate the acoustic properties of real environments, leading to an inauthentic user experience and potential issues like motion sickness.
Innovation Solution
The system detects audio events and determines the user's location within the mixed reality environment, identifying the acoustic region and determining relevant acoustic parameters. These parameters are used to apply a transfer function to the audio signal, simulating the acoustic effects of the real environment and enhancing the realism of the audio experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional audio systems (fixed speakers) are used, then device complexity is low, but the audio experience lacks immersion and realism
Solution Approach 1:
The patent implements dynamic audio spatialization by continuously adjusting audio parameters based on real-time head tracking and acoustic environment detection. The system adapts the virtual sound source position and acoustic properties dynamically as the user moves their head, creating an immersive experience that responds to user actions rather than being static.
Solution Approach 2:
The patent replaces traditional mechanical audio systems with virtual audio rendering. Instead of using multiple physical speakers arranged in space, the system uses software-based virtual sound sources that are positioned and acoustically processed to simulate three-dimensional audio fields, substituting physical hardware complexity with computational methods.
2Reliability
If virtual audio does not account for user surroundings, then device complexity is low, but auditory authenticity deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms where the system detects the user's acoustic environment using microphones and compares it with the rendered virtual audio characteristics. The system adjusts the virtual sound parameters based on this feedback to maintain auditory authenticity, ensuring the virtual audio matches the user's expectations for the given environment.
Solution Approach 2:
The patent dynamically changes audio parameters such as reverb characteristics, sound diffusion, and spatial positioning based on detected environmental factors. By adjusting these parameters in real-time according to the user's location and surrounding acoustics, the system maintains auditory authenticity without requiring complex fixed hardware configurations.
3Object-affected harmful factors
If visual mismatches are present in XR systems, then ease of operation is maintained, but user comfort deteriorates due to motion sickness
Solution Approach 1:
The patent replaces visual-dependent spatial cues with acoustic spatialization that independently adapts to the user's environment. By using virtual audio rendering that accounts for acoustic room characteristics rather than relying on visual-motor coordination, the system reduces sensory conflict that causes motion sickness while maintaining spatial awareness.
Data Source
AI summary
A method of presenting an audio signal to a user of a mixed reality environment is disclosed. According to examples of the method, an audio event associated with the mixed reality environment is detected. The audio event is associated with a first audio signal. A location of the user with respect to the mixed reality environment is determined. An acoustic region associated with the location of the user is identified. A first acoustic parameter associated with the first acoustic region is determined. A transfer function is determined using the first acoustic parameter. The transfer function is applied to the first audio signal to produce a second audio signal, which is then presented to the user.