Headrest Audio System Position Adaptation
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Solution Overview
Problem
Existing audio systems in vehicles, particularly those integrated into seat headrests, face challenges in optimizing sound quality due to suboptimal active noise reduction as users often do not sit in the intended position, leading to inadequate sound rendition.
Innovation Solution
An audio processing method and system that detects the user's head position and adjusts audio parameters based on pre-recorded profiles tailored to the user's characteristics and temporary state, using multiple speakers and microphones to enhance sound quality by applying operations like delay adjustment, gain adjustment, equalization, and active noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If active noise reduction is applied with fixed parameters, then noise cancellation is achieved for a specific position, but the noise reduction becomes suboptimal when users are not positioned correctly
Solution Approach 1:
The patent implements dynamic adjustment of audio processing parameters based on detected head position. The system transitions from static fixed parameters to dynamic parameters that adapt in real-time to user position, ensuring optimal noise reduction and audio rendering regardless of where the user sits on the seat.
Solution Approach 2:
The system changes audio processing parameters (such as noise reduction coefficients, equalization settings, and speaker gain) based on the detected head position. By modifying these parameters dynamically, the system maintains high noise reduction accuracy across different seating positions rather than being optimized for a single fixed position.
2Manufacturing precision
If audio parameters are optimized for a specific user position, then audio rendering quality is improved for that position, but the system fails to accommodate users in different positions
Solution Approach 1:
The patent makes the audio rendering system dynamic by continuously detecting head position and adjusting parameters accordingly. This allows the system to maintain high audio rendering quality for any user position rather than being fixed to a single optimized position, accommodating user movement and different seating preferences.
Solution Approach 2:
The system adjusts audio rendering parameters (such as spatialization, equalization, and speaker balance) based on detected head position. This parameter adaptation ensures that high-quality audio rendering is maintained regardless of whether the user sits centrally, to the side, or leans forward, thereby achieving both quality and flexibility.
3Adaptability or versatility
If the system uses multiple detection methods and profile adjustments, then audio customization is enhanced, but the system complexity increases
Solution Approach 1:
The patent implements pre-recorded audio setting profiles that are prepared in advance for different user characteristics and temporary states. This preliminary preparation allows the system to quickly select and apply appropriate profiles without requiring complex real-time calculations, thereby enhancing customization while managing system complexity through pre-computed solutions.
Solution Approach 2:
The system uses feedback from head position detection to dynamically select and adjust audio profiles. By continuously monitoring user position and adjusting parameters based on this feedback, the system achieves high adaptability through a relatively simple mechanism that relies on sensor input and pre-defined profile adjustments rather than complex real-time optimization algorithms.
Data Source
AI summary
An audio processing method and system for a seat headrest audio system, the audio system including at least two speakers positioned on opposite sides of the headrest, the method including detecting a position of the user's head and adjusting a first set of parameters of at least one audio processing operation as a function of that position. The method includes determining a user characteristic and/or temporary state of the user, selecting an audio settings profile related to that characteristic, the audio settings profile including a second set of prerecorded audio profile parameters, and adjusting a third set of audio parameters effectively applied to control the audio rendering of each speaker, based on the first and second sets of parameters.