Virtual Loudspeaker Array for Targeted Audio Distribution
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Solution Overview
Problem
Existing public announcement systems rely on multiple physical loudspeakers to distribute announcements, which can be inefficient and impractical for directing specific messages to individuals or groups in large spaces.
Innovation Solution
The system generates focused sound sources as virtual loudspeakers using Wavefield synthesis and monopole synthesis techniques, allowing for spatially confined audio messages and individualized guidance within a predefined space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple physical loudspeakers are used to distribute announcements in large spaces, then the coverage area is improved, but the system complexity and impracticality for individual targeting increases
Solution Approach 1:
The patent creates virtual loudspeakers by synthesizing acoustic fields through digital signal processing. Instead of using multiple physical loudspeakers to achieve wide coverage, the system generates focused sound sources at desired locations through wavefield synthesis and monopole synthesis algorithms, effectively copying the function of physical speakers without the hardware complexity
Solution Approach 2:
The patent replaces the mechanical/acoustic system of multiple physical loudspeakers with a digital signal processing system. The wavefield synthesis and monopole synthesis techniques use computational methods to generate focused sound sources, substituting the need for complex physical speaker arrangements with algorithmic processing
2Area of stationary object
If multiple physical loudspeakers are used to distribute announcements, then the coverage area is improved, but the ability to direct specific messages to individuals deteriorates
Solution Approach 1:
The patent implements local quality by creating focused sound sources at specific locations within the large space. Each virtual loudspeaker can be positioned precisely where needed and directed at specific individuals or groups, allowing the system to adapt its acoustic properties locally rather than using uniform omnidirectional broadcasting
Solution Approach 2:
The system dynamically positions and adjusts virtual loudspeakers based on real-time requirements. The wavefield synthesis and monopole synthesis algorithms can adaptively place focused sound sources at different locations and direct them at specific targets, enabling the system to change its configuration dynamically rather than being fixed
Data Source
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AI summary
An apparatus comprising circuitry configured to generate one or more focused sound sources as virtual loudspeakers of an announcement system.