Acoustic Feedback for Hand Detection in Virtual Reality
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Solution Overview
Problem
Existing virtual reality headsets, such as HoloLens, do not provide precise information to users about the detection of their hands, including which hand is detected and its position within the virtual environment, especially when the hand leaves the display area, leading to limited interaction accuracy.
Innovation Solution
A method that generates sound signals based on the detection of a user's body parts, such as hands, allowing continuous feedback even when the part is outside the virtual environment's display space, with signal characteristics like frequency and spatialization indicating the hand's position and identity, enhancing interaction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual feedback is used to indicate hand detection in virtual reality, then the user receives information about hand detection, but the feedback is lost when the hand leaves the display area and lacks precision about hand position and identity
Solution Approach 1:
The patent replaces the visual display system with an acoustic feedback system. Speakers positioned around the user emit sounds that provide continuous hand detection feedback regardless of whether the hand is within the visual display area. The acoustic field extends beyond the limited visual field, allowing the system to convey hand position and identity information through sound location and characteristics rather than requiring visual representation.
Solution Approach 2:
The patent introduces sound as an intermediary medium to transmit hand detection information. Instead of relying directly on visual display which is limited by field of view constraints, the system uses acoustic signals as a mediator to convey information about hand detection, position, and identity to the user's auditory system, which has a much wider effective detection range.
2Device complexity
If the detection space and reproduction space are the same in virtual reality systems, then the system structure is simplified, but the user loses feedback about hand position when the hand moves outside the display area
Solution Approach 1:
The patent extends the feedback dimension from visual (2D display area) to acoustic (360-degree spatial sound field). By utilizing the spatial dimension of sound propagation in three-dimensional space, the system can provide feedback about hand positions that extend beyond the limited two-dimensional display area, effectively adding a spatial dimension to the feedback mechanism without fundamentally changing the detection space structure.
3Ease of manufacture
If basic visual feedback is provided for hand detection, then the implementation is simple, but the user cannot distinguish which hand is detected or its precise location
Solution Approach 1:
The patent applies local quality by assigning distinct acoustic characteristics to different hands and positions. Each speaker location emits sounds with specific properties (timing, intensity, frequency) that encode information about which hand is detected and its precise position. This allows the system to maintain implementation simplicity while providing rich, differentiated information about hand identity and location through localized acoustic variations.
Solution Approach 2:
Instead of having the hand directly interact with visual elements on a screen, the patent inverts the feedback mechanism by having speakers around the user emit sounds that actively reach the user's ears. This inverted approach—where information comes to the user through sound rather than the user looking at a display—enables precise hand identification and location feedback without requiring complex visual processing or hand-eye coordination within a limited field of view.
Data Source
AI summary
A method and corresponding device for processing virtual-reality environment data, wherein at least one part of the body of a user of the virtual-reality environment is detected. The part of the body of the user is capable of interacting with at least one object of the virtual-reality environment. At least one sound signal is generated according to the detection of the at least one part of the body of the user of the virtual-reality environment.