Vehicle Audio Zone Control for Sound Isolation and Quality Tradeoffs
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Solution Overview
Problem
Sound zone systems in vehicles face a tradeoff between sound isolation and subjective sound quality, where maximizing separation results in poor spatial and spectral performance, and prioritizing listening experience leads to distracting sounds from adjacent zones.
Innovation Solution
A system and method utilizing a digital signal processing matrix and audio controller to optimize sound zone experiences by providing a contrast mode for equal listening across zones and a front optimized mode for enhanced sound quality at the expense of separation, allowing users to toggle between these modes via a graphical user interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the system focuses on cancelling sounds from adjacent zones to achieve separation, then isolation between zones is improved, but spatial performance and spectral performance deteriorate
Solution Approach 1:
The system dynamically adjusts audio processing parameters based on selected operating modes (contrast mode vs. front optimized mode). In contrast mode, the system prioritizes sound isolation with different processing characteristics, while in front optimized mode, it prioritizes spatial and spectral performance. This dynamic reconfiguration allows the system to adapt its behavior to different user needs without being locked into a single fixed configuration.
2Manufacturing precision
If the system provides surround algorithms and headrest speakers to improve listening experience, then sound quality is improved, but sound isolation between zones deteriorates
Solution Approach 1:
The system switches between different audio processing configurations based on user selection. When front optimized mode is selected, the system employs surround algorithms and headrest speaker configurations to maximize sound quality for front occupants. When contrast mode is selected, the system adjusts processing to prioritize isolation between zones. This dynamic switching resolves the contradiction by allowing users to choose their preferred operating condition.
3Manufacturing precision
If the system optimizes for equal listening experience across all zones, then listening experience is improved, but sound isolation between zones deteriorates
Solution Approach 1:
The system provides two distinct operating modes that can be dynamically selected. In contrast mode, the system optimizes for equal listening experience across all zones by distributing audio content uniformly. In front optimized mode, the system prioritizes sound isolation to prevent audio from front zones from leaking to rear zones. This dynamic mode switching allows the system to adapt to different user preferences and scenarios.
Data Source
AI summary
An apparatus for providing a contrast mode and a front optimized mode for audio in a vehicle is provided. An audio controller is programmed to transmit first audio content in a first zone seating area and to transmit second audio content in a second zone seating area. The audio controller receives a first indication to transmit the first audio content in the first zone seating area and the second audio content in the second zone seating area in the contrast mode to provide an equal listening experience. The audio controller receives a second indication to transmit the first audio content in the first zone seating area and the second audio content in the second zone seating area in the front optimized mode to increase a quality of sound in the first zone seating area and to decrease a quality of sound in the second zone seating area.