Vehicle Navigation Sound Localization Using 3D Audio
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Solution Overview
Problem
Conventional navigation devices struggle to intuitively convey navigation information to drivers, as the meaning of guiding and warning tones is not easily understood due to limitations in sound localization technology, particularly in vehicles without rear speakers.
Innovation Solution
A navigation device with a three-dimensional sound reproducing system that uses a controller to adjust the localization direction of playback sounds based on vehicle and driver information, employing either 3D surround sound or virtual sound technology to enhance directional awareness without requiring additional rear speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional navigation devices use standard guiding and warning tones, then the navigation information can be reproduced, but the driver cannot intuitively understand the meaning of the navigation cues
Solution Approach 1:
The patent applies local quality by directing sound to specific localization positions corresponding to different navigation scenarios (e.g., left turn guidance from left speaker, right turn from right speaker, straight ahead from front speaker). This spatial differentiation allows drivers to intuitively understand navigation meaning based on sound direction, resolving the contradiction between information reproduction and driver comprehension.
Solution Approach 2:
The patent transitions from conventional two-dimensional sound reproduction to three-dimensional sound localization by utilizing spatial positioning of sound sources. By adding the dimensional aspect of sound direction and localization position, the system enables intuitive navigation understanding without compromising driver comprehension.
2Measurement precision
If rear speakers are installed to improve sound localization, then directional awareness can be enhanced, but implementation cost increases
Solution Approach 1:
The patent uses virtual sound technology to create simulated rear speaker effects without physically installing rear speakers. By processing sound signals to mimic the acoustic characteristics of rear speaker positions, the system achieves accurate sound direction recognition while avoiding the additional hardware costs and installation complexity.
Solution Approach 2:
The patent replaces the mechanical approach of installing physical rear speakers with an electronic signal processing approach. By using audio processing algorithms to simulate rear speaker sound fields, the system achieves the same directional awareness enhancement without the mechanical addition of rear speaker hardware, reducing implementation costs.
Data Source
AI summary
According to an embodiment, a navigation device installed in a vehicle includes an obtainer, a controller, and a reproducer. The obtainer obtains at least one of vehicle information related to the vehicle and driver information related to a driver of the vehicle. The controller controls, based on at least one of the vehicle information and the driver information, localization direction of a playback sound which is to be reproduced for the driver. The reproducer reproduces the playback sound using a three dimensional sound based on control of the localization direction.