Vehicle Personalized Audio Space Generation Using Directional Speakers
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Solution Overview
Problem
Current infotainment systems in vehicles fail to provide personalized audio experiences for multiple users due to overlapping audio from multiple devices, as existing sound segregation techniques are inefficient in closed spaces like cars, where climate and acoustic conditions vary.
Innovation Solution
A system using image sensors to determine user positions and acoustic characteristics, directing first directional speakers to play user-selected audio, and generating a second sound wave to converge with the first at the audio space boundary, ensuring the audio is confined to each region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices or sources are used to play music for different users, then each user can have their preferred content, but audio from multiple devices overlaps and cannot be heard properly
Solution Approach 1:
The vehicle interior is divided into multiple regions, with each region having dedicated directional speakers that play audio only for users in that specific region. This spatial segmentation prevents audio overlap by ensuring that speakers in one region do not play sound in other regions, thus resolving the contradiction between personalized content delivery and audio interference.
Solution Approach 2:
Each region in the vehicle is equipped with directional speakers tailored to that specific location's acoustic characteristics and user positions. The speakers are configured to direct sound locally to the intended user, providing personalized audio quality in each region while preventing sound from spreading to other regions, thereby eliminating audio overlap.
2Measurement precision
If directional speakers are used to direct sound in a particular direction, then sound can be targeted to specific users, but existing techniques fail to efficiently deliver sound in closed spaces like vehicles with varying acoustic conditions
Solution Approach 1:
The system dynamically determines the direction of directional speakers based on real-time user positions detected by image sensors and adapts to varying acoustic conditions in different vehicle regions. This dynamic adjustment ensures precise sound directionality while maintaining adaptability to changing acoustic environments, resolving the contradiction between targeted sound delivery and environmental adaptability.
Solution Approach 2:
The system uses image sensors to detect user positions and acoustic characteristics, then adjusts the direction of directional speakers accordingly. This feedback mechanism ensures that sound is precisely directed to the intended user while adapting to varying acoustic conditions in different vehicle regions, thus resolving the contradiction between sound directionality and environmental adaptability.
3Adaptability or versatility
If audio space boundary is defined based on user position and speaker direction, then personalized audio spaces can be created, but determining the boundary becomes difficult due to variations in user parameters and speaker positions
Solution Approach 1:
The system introduces an intermediary computational layer that processes user position data from image sensors and speaker position data to automatically determine audio space boundaries. This intermediary processing simplifies the boundary determination by converting complex geometric and acoustic calculations into automated algorithms, thus resolving the contradiction between personalized space creation and determination complexity.
4Object-generated harmful factors
If sound is segregated in enclosed spaces using directional speakers, then audio can be directed to specific regions, but sound patterns still overlap between regions due to different acoustic impedance caused by climate control
Solution Approach 1:
The system configures directional speakers in each region with specific directional characteristics tailored to that region's acoustic impedance caused by local climate control conditions. This local optimization ensures that sound is directed precisely within each region without overlapping into adjacent regions, thus resolving the contradiction between sound segregation and regional climate control adaptability.
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
This approach effectively creates personalized audio spaces within a vehicle by eliminating sound overlap, allowing each user to listen to their preferred content without interference from other regions.
Implementation Method 1
a second sound wave corresponding to the first sound wave is generated and transmitted along the identified audio space boundary of the one of the one or more regions using one or more second directional speakers associated with the one of the one or more regions. The first sound wave and the second sound wave converge at the audio space boundary of the region such that the second sound wave restricts rendering of the first sound wave beyond the audio space boundary
Data Source
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AI summary
The present disclosure relates to a method and system for generating personalized audio space in vehicle. Information related to user in each region of the vehicle is collected and analyzed to determine direction of first directional speakers associated with corresponding region. An audio space boundary for each region is identified based on the direction of first directional speakers in the corresponding region. Further, the proposed method renders first sound wave of a user selected audio using first directional speakers in the region and transmits a second sound wave corresponding to first sound wave in the region using second directional speakers associated with the corresponding region. The second sound wave restricts rendering of the first sound wave beyond the audio space boundary of the one of the one or more regions to generate the personalized audio space in the vehicle.