Directional Speaker Array Equalization Under Distortion Limits
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Solution Overview
Problem
Achieving high audio quality in environments is challenging due to sub-optimal placement of speakers and listeners, leading to degraded acoustic quality and user satisfaction.
Innovation Solution
An electronic device with a directional speaker array that dynamically adjusts drive signals based on audio content and acoustic radiation patterns, limiting sound distortion and adapting radiation patterns to optimize sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If speakers are placed in sub-optimal positions or listeners are not at ideal positions, then device placement flexibility is improved, but acoustic quality deteriorates
Solution Approach 1:
The system dynamically adjusts the acoustic radiation pattern and drive signals in real-time based on the positions of speakers and listeners. The radiation pattern is adapted to compensate for sub-optimal placements, allowing the system to maintain high acoustic quality regardless of physical configuration. This dynamic adaptation resolves the contradiction by making the system flexible in placement while preserving acoustic precision through active control.
2Power
If drive signals are increased to improve sound output, then power output is improved, but sound distortion increases
Solution Approach 1:
The system changes the parameters of drive signals dynamically based on the acoustic radiation pattern and distortion margins. By adjusting signal parameters in real-time, the system optimizes power output while maintaining distortion below acceptable thresholds. This allows high power output without proportionally increasing distortion, resolving the contradiction between power and distortion.
3Manufacturing precision
If the acoustic radiation pattern is made highly directional, then sound focus is improved, but distortion margin decreases
Solution Approach 1:
The system dynamically adapts the acoustic radiation pattern based on real-time conditions including listener position and distortion margins. When distortion margins become constrained, the system adjusts the radiation pattern to maintain focus precision while staying within distortion limits. This dynamic balancing act resolves the contradiction by allowing high directional precision when conditions permit while maintaining reliability when distortion margins are constrained.
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 acoustic quality by reducing sound distortion and maintaining optimal listening experiences across various environments and listener positions, enhancing user satisfaction and provider revenue.
Implementation Method 1
a set of drivers that outputs sound
Data Source
AI summary
An electronic device that provides dynamic equalization in a directional speaker array is described. Based at least in part on audio content and an acoustic radiation pattern associated with a second electronic device, the electronic device may determine drive signals for a set of drivers. Then, the electronic device may adjust the drive signals for at least a subset of the set of drivers based at least in part on a distortion margin in at least the subset of the drivers, where the distortion margin is based at least in part on the drive signals, a distortion threshold of at least the subset of the drivers and a volume setting. Next, based at least in part on the adjusted drive signals, the electronic device may output, using the set of drivers, the sound corresponding to the audio content.