Adaptive Loudspeaker Array with DSP Control
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Solution Overview
Problem
Current sound systems for live concerts require labor-intensive setup and adjustment of loudspeaker arrays, often resulting in non-ideal coverage due to incorrect angles and trim heights, which can lead to poor sound distribution across venues.
Innovation Solution
A loudspeaker system with adaptive capabilities, featuring individually powered and controlled transducers, a digital signal processing network, and a control system that calculates and adjusts acoustic lobe formation parameters to direct sound vertically and horizontally, utilizing proximity sensors and tilt sensors for precise positioning and self-testing to ensure optimal coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual setup and adjustment of loudspeaker arrays is used, then the system can be configured for different venues, but the setup process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent replaces manual mechanical adjustment of speaker angles and positions with automated electronic control systems. The system uses computer-controlled mechanisms to adjust speaker orientations and positions based on venue data, eliminating the need for labor-intensive manual setup while maintaining venue-specific optimization
Solution Approach 2:
The system performs preliminary configuration by storing venue data and pre-calculating optimal speaker arrangements before arrival at the venue. This allows the system to be ready for rapid deployment without requiring time-consuming on-site adjustments, as the configuration plan is prepared in advance
2Reliability
If manual adjustment of speaker angles is performed, then coverage can be optimized, but incorrect angles result in non-ideal sound distribution
Solution Approach 1:
The system incorporates feedback mechanisms that measure actual sound distribution and compare it with the desired coverage pattern. Based on this feedback, the system automatically adjusts speaker angles and positions to correct any deviations, ensuring reliable sound coverage without requiring manual precision in initial setup
Solution Approach 2:
The patent replaces manual angle adjustment with computer-controlled positioning systems that use sensors and actuators to achieve precise speaker orientations. This automated control eliminates human error in angle setting and ensures consistent, accurate positioning for optimal sound distribution
3Area of stationary object
If multiple separate loudspeaker arrays are used to cover different areas, then comprehensive venue coverage is achieved, but the system complexity increases
Solution Approach 1:
The patent employs universal speaker units that can perform multiple functions - each speaker can be independently positioned and angled to serve different coverage requirements. This allows a single standardized speaker type to replace multiple specialized arrays, reducing system complexity while maintaining comprehensive coverage capability
Solution Approach 2:
The system divides the venue coverage into multiple zones, with each zone served by independently controllable speaker groups. This segmentation allows simplified control of individual zones while achieving comprehensive coverage when all zones operate together, reducing the complexity of managing the entire system as a single unit
4Measurement precision
If acoustic modeling software is used to plan speaker placement, then coverage can be optimized, but the actual implementation requires extensive manual measurement and adjustment
Solution Approach 1:
The system replaces manual measurement and adjustment processes with automated electronic positioning systems. The acoustic modeling software generates digital plans that are directly translated into automated speaker positioning and orientation, eliminating the need for manual measurements and physical adjustments during implementation
Solution Approach 2:
The system incorporates self-configuration capabilities where speakers automatically adjust their positions and orientations based on digital venue data. This self-service functionality eliminates the need for manual intervention in the implementation phase, as the system autonomously translates the acoustic model into physical configuration
Data Source
AI summary
Audio loudspeaker 100 can be arranged in various vertical arrays, such as 102 or 104. Each loudspeaker 100 includes a generally trapezoidal-shaped housing 120 composed of two forwardly projecting lobe sections 122. A pair of low-frequency cone transducers 130 are housed in the lobe sections 122. A vertically arranged set 132 of high-frequency compression drivers are positioned centrally in the housing to project in the forward direction. Three mid-frequency cone transducers 134 are vertically arranged along opposite sides of the high frequency drivers 132. Each of the low-, mid-, and high-frequency transducers are individually powered and controlled by a separate DSP channel.