Multi-Zone Audio Interference Control via Dynamic Signal Adaptation
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Solution Overview
Problem
Existing systems for generating multiple sound zones struggle with interference between zones, where changes to the audio in one zone to mitigate interference have not been effectively proposed or implemented based on interference values.
Innovation Solution
A system comprising multiple speakers and a controller that accesses and converts audio signals for each zone, derives an interference value, and adapts the audio signal parameters if the interference exceeds a threshold, specifically altering parameters such as level, frequency filtering, and delay to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If audio signals are provided to multiple sound zones simultaneously, then sound coverage is improved, but interference between zones increases
Solution Approach 1:
The audio signal is segmented into multiple independent audio signals, each designated for a specific sound zone. The system divides the original audio content into zone-specific streams that can be independently processed and controlled, allowing each zone to receive tailored audio content without mutual interference.
Solution Approach 2:
Different audio parameters are applied locally to each sound zone based on its specific characteristics and requirements. Each zone receives audio signals with parameters optimized for that particular space, including zone-specific volume levels, frequency responses, and timing adjustments to achieve optimal sound quality without affecting other zones.
2Manufacturing precision
If audio parameters are adjusted to reduce interference in one zone, then sound quality in that zone is improved, but sound quality in other zones may deteriorate
Solution Approach 1:
The system continuously monitors the audio output in each sound zone and uses this feedback to dynamically adjust parameters. By measuring the actual sound field conditions in each zone and comparing them against target parameters, the system automatically compensates for variations and maintains consistent sound quality across all zones despite individual parameter adjustments.
Solution Approach 2:
Audio parameters are made dynamic rather than static, allowing continuous adaptation to changing conditions in each zone. The system can adjust volume, frequency response, and timing parameters in real-time based on zone-specific requirements while maintaining overall system coherence and consistent sound quality across all zones.
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
Effectively reduces interference between sound zones by dynamically adjusting audio signal parameters, improving the quality of sound in each zone by maintaining interference below a predetermined threshold.
Implementation Method 1
a plurality of speakers configured to generate a first audio signal in a first of the sound zones and a second audio signal in a second of the sound zones
Data Source
AI summary
A system and a method for providing sound into two different sound zones, where an a first signal and a second signal are accessed and converted into speaker signals generating the sound in the zones. interference value is determined. If the interference value exceeds a predetermined threshold, one or more parameter changes are determined to parameters of the conversion which, when implemented, will ensure that the interference in the first zone by sound in the second zone is maintained below a threshold limit.