Driver Alert Audio Switching for Head-Positioned 3D Sound
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Solution Overview
Problem
Existing safety support devices for vehicles using three-dimensional sound to alert drivers of collision risks are ineffective when the driver's head position changes, as the sound localization is compromised by inappropriate ear-speaker positioning.
Innovation Solution
A safety support device that includes detectors for object positioning, dual-purpose speakers for three-dimensional sound output, a monaural speaker for non-3D sound output, a monitoring camera to track ear positions, and a controller to dynamically switch between 3D and non-3D sound based on ear position and head orientation, ensuring accurate notification of collision risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional sound is used to notify the driver of collision risks, then the driver can sense the direction of the object, but the sound localization becomes inaccurate when the driver's head position changes
Solution Approach 1:
The system dynamically switches between three-dimensional sound output and ordinary sound output based on the driver's head position. When the head is in the appropriate position range, three-dimensional sound is used for accurate localization; when the head position deviates, the system switches to ordinary sound to ensure the driver still receives the collision risk notification, thus adapting to changing conditions while maintaining notification effectiveness
Solution Approach 2:
The system changes the sound output parameter from three-dimensional sound to ordinary sound based on the detected head position. This parameter change allows the system to maintain effective notification across different head positions by selecting the appropriate sound type according to the current spatial relationship between the speaker and the driver's ears
2Measurement precision
If three-dimensional sound is always outputted, then direction sensing is improved, but notification effectiveness is reduced when head position is inappropriate
Solution Approach 1:
The system uses the monitoring camera to detect the driver's head position and provides feedback to the control unit. Based on this feedback, the control unit determines whether to output three-dimensional sound or ordinary sound, ensuring that the notification method adapts to the actual head position and maintains reliability across different driving conditions
3Adaptability or versatility
If monitoring of ear positions is added to enable dynamic sound output switching, then notification adaptability is improved, but device complexity increases
Solution Approach 1:
The monitoring camera performs multiple functions: it detects the driver's head position for sound output control and can also serve as a general monitoring device. By making the camera multi-functional, the system achieves adaptability to head position changes without adding dedicated sensors, thus reducing the increase in device complexity while maintaining notification adaptability
Data Source
AI summary
A safety support device includes an object detection camera and a radar device, which serve as detectors, and a controller that controls a dual-purpose speaker and a dual-purpose speaker, which serve as three-dimensional sound outputters, and a monaural speaker that serves as a sound outputter, based on detection information of a monitoring camera that serves as a monitor. The controller selects, in accordance with the positions of the ears of a driver, which are detected by the monitoring camera, whether to cause the dual-purpose speaker and the dual-purpose speaker to output a three-dimensional sound or to cause the dual-purpose speaker, the dual-purpose speaker, and the monaural speaker to output a sound.