Spatial Audio Acoustic Tracking for Slow Head Motion
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Solution Overview
Problem
Existing spatial audio technologies relying on gyro-meters or accelerometers in headphones are limited in scenarios where user head movement is slow or back-and-forth, leading to reduced precision in tracking user motion and audio adjustment.
Innovation Solution
An acoustic wave analysis method and system that uses acoustic wave signals to analyze user motion and adjust output signals based on intensity variations, incorporating light source detection for enhanced precision, and applies Doppler effect for behavior analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gyro-meters or accelerometers are used to track user head movement, then motion tracking is enabled, but precision deteriorates when user head moves too slowly or in a back-and-forth manner
Solution Approach 1:
The patent replaces the mechanical sensing system (gyro-meters and accelerometers) with an acoustic wave-based detection system. By transmitting acoustic waves and analyzing the received signals, the system determines user behavior and head position without relying on mechanical motion sensors, thereby achieving consistent precision across all motion patterns including slow or back-and-forth movements.
2Adaptability or versatility
If acoustic wave intensity variation is used to determine user position, then adaptability to all motion patterns is improved, but measurement precision may be affected by environmental factors
Solution Approach 1:
The system transmits acoustic waves and receives the reflected or received signals, then analyzes the intensity variations to determine user position and behavior. This active sensing approach with signal analysis provides feedback-based position determination that is adaptable to all motion patterns while maintaining precision through signal processing.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium between the transmitter and the user's head. By analyzing how the acoustic waves interact with the user's head position and movement, the system indirectly determines position information with high precision while being adaptable to various motion patterns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves accuracy in tracking dynamic motion and enhances user experience by simulating realistic sound and positioning, addressing the limitations of existing technologies in precision.
Implementation Method 1
receiving the acoustic wave signal by the receiving end to generate a corresponding intensity variation information
Implementation Method 2
the algorithm performs an operation based on an inverse relationship between the intensity variation information and a distance value between the transmitting end and the receiving end
Implementation Method 3
a light source is detected to generate a corresponding light source variation information, and the transmitting end transmits the acoustic wave signal with a corresponding intensity according to the light source variation information
Implementation Method 4
a frequency drift information is generated according to a variation of the positioning information, and the frequency drift information is processed based on Doppler effect to generate an acceleration
Data Source
AI summary
The present invention provides an acoustic wave analysis method, system and device applied to spatial audio. The acoustic wave analysis method comprises the following steps: transmitting an acoustic wave signal from a transmitting end; receiving the acoustic wave signal by a receiving end to generate corresponding intensity variation information; calculating the intensity variation information by means of an algorithm to generate positioning information; and adjusting the acoustic wave signal according to the positioning information to generate an acoustic wave signal with spatial audio. In this way, a user's movement is more accurately tracked, and the audio is adjusted accordingly, thereby enhancing the user experience.