Context-Based Audio Tuning for Vehicle Sound Fields
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Solution Overview
Problem
Vehicle audio systems often fail to provide an acoustically optimized sound field for all seating positions due to suboptimal loudspeaker placement and the irregular nature of vehicle interiors, which can result in uneven frequency response and a less than complete audio experience for passengers.
Innovation Solution
A system and method for selecting an audio tuning profile based on the content or source of an audio signal, allowing for the transmission of primary and secondary audio signals to loudspeakers with different settings, prioritizing certain signals like navigation prompts or alerts, and using a signal processing unit with memory to store and apply specific audio settings for each profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vehicle audio systems use fixed tuning profiles optimized for the driver's seat, then the audio quality at the driver's position is improved, but the audio experience for passengers in other seating positions deteriorates
Solution Approach 1:
The audio system dynamically switches between multiple pre-configured tuning profiles based on the detected primary listening position. Each profile contains specific equalizer settings, crossover frequencies, and time delay parameters optimized for different seating locations (driver, front passenger, rear passengers). This dynamic adaptation resolves the contradiction by providing driver-optimized audio when the driver is the primary listener while automatically adjusting for passenger-optimized audio when passengers are present, thus maintaining high audio quality across different seating configurations.
Solution Approach 2:
The system changes multiple audio parameters simultaneously when switching between tuning profiles, including equalizer frequency responses, crossover point frequencies, and time delay values for different loudspeakers. These parameter changes allow the system to optimize the sound field for specific listening positions, resolving the contradiction between fixed optimization and multi-position adaptability by creating discrete optimized states for different seating arrangements.
2Adaptability or versatility
If multiple audio signals are transmitted simultaneously to loudspeakers, then the system can provide both entertainment and information signals, but the audio clarity and priority transmission deteriorates
Solution Approach 1:
The system uses periodic monitoring of audio signal priorities and dynamically adjusts the audio routing in real-time. When a high-priority signal (such as navigation prompt or safety alert) is detected, the system temporarily interrupts or attenuates lower-priority entertainment audio, then restores it after the priority signal completes. This periodic assessment and adjustment mechanism allows simultaneous transmission capability while maintaining audio clarity by ensuring priority signals are always clearly audible when needed.
Solution Approach 2:
The system introduces an intermediary audio processing stage that receives multiple audio signals, determines their priorities, and applies appropriate mixing and routing before sending to loudspeakers. This intermediary layer resolves the contradiction by intelligently managing signal conflicts, allowing multiple signals to coexist when appropriate while ensuring clear transmission of priority signals by suppressing lower-priority audio during critical moments.
3Measurement precision
If the system switches between different tuning profiles based on audio signal priority, then the audio optimization for specific listening positions is improved, but the system complexity increases
Solution Approach 1:
The system performs preliminary configuration by pre-storing multiple complete tuning profiles in memory, each containing pre-calculated equalizer settings, crossover frequencies, and time delay parameters for different listening positions. This preliminary preparation resolves the contradiction by moving the complex processing work to the setup phase rather than real-time operation. During actual use, the system only needs to retrieve and switch between pre-configured profiles based on simple detection of listening position and signal priority, maintaining high audio optimization while minimizing real-time processing complexity.
Data Source
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AI summary
A system and method is provided for selecting an audio tuning profile to apply to audio signals to generate a sound field acoustically optimized at least at one listening position in a listening environment, such as a vehicle passenger compartment. Each audio tuning profile may include a number of audio settings to be applied to an audio signal at one or more audio loudspeaker channels. The audio tuning profile may be selected based on the content or the source of the audio data signals. Thus, audio tuning may be based on the context of the audio.