Acoustic Control Device for Dynamic Sound Localization
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Solution Overview
Problem
In acoustic systems, it is challenging to continuously localize sound output from audio devices when obstacles interfere or installation positions change, as sound transfer characteristics fluctuate, making it difficult to maintain sound localization effectively.
Innovation Solution
An acoustic system comprising an audio output device and an acoustic control device that measures rotation angles using an angle sensor, adjusts transfer functions, and performs signal processing to maintain sound localization at specific listener positions, even when obstacles interfere or installation positions change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If audio output devices are installed above the listener's ears, then sound localization at specific listener positions is improved, but the system becomes sensitive to changes in installation positions and obstacles
Solution Approach 1:
The patent implements dynamic adjustment of transfer functions based on real-time detection of listener position and orientation. The acoustic control device continuously adapts the sound transfer characteristics to maintain accurate sound localization despite changes in installation positions or obstacles, transforming a static system into a dynamic one that responds to environmental changes
Solution Approach 2:
The system employs feedback mechanisms by detecting listener position and orientation, then adjusting the transfer functions accordingly. This closed-loop control ensures that sound localization remains accurate even when installation positions change or obstacles interfere, as the system continuously compensates for detected variations
2Reliability
If the system adapts to changes in installation positions and obstacles, then sound localization reliability is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameters of the transfer functions dynamically based on detected listener position and orientation. By adjusting these acoustic parameters in response to environmental changes, the system maintains reliable sound localization without requiring fundamentally new hardware or overly complex processing architectures
Data Source
AI summary
An acoustic system includes an audio output device configured to output a sound to a listener being still at least for a predetermined period of time, and an acoustic control device configured to perform signal processing for localizing, at a specific part of the listener, the sound that is output through the audio output device, wherein the audio output device is installed above the specific part of the listener.