Driving Assistance Audio Cues for Intuitive Speed Guidance
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Solution Overview
Problem
Conventional driving assistance systems lack the ability to intuitively convey acceleration or deceleration guidance to drivers in various driving situations beyond specific scenarios like merging and lane changes.
Innovation Solution
A driving assistance device and method that uses a processor to determine acceleration or deceleration instructions based on vehicle state, outputting a fundamental sound and additional sounds with varying pitches to intuitively guide drivers through a speaker, with pitch differences indicating the required action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional notification sounds are used for driving assistance, then the system is simple and easy to implement, but the guidance content of acceleration or deceleration is not intuitively conveyed to the driver
Solution Approach 1:
The notification sound is segmented into multiple independent sound elements: a fundamental sound and multiple additional sounds with different pitches. Each sound element can be independently controlled and adjusted, allowing the system to convey different guidance information through combinations of these segmented sound components rather than using a single complex sound waveform.
Solution Approach 2:
Different pitch characteristics are assigned to different additional sounds based on their distance from the fundamental sound pitch. Additional sounds closer to the fundamental pitch convey different information than those farther away. This local differentiation of pitch quality enables intuitive conveyance of acceleration versus deceleration guidance without requiring complex sound synthesis algorithms.
2Reliability
If multiple sound elements with different pitches are used to convey acceleration/deceleration guidance, then the guidance becomes intuitive and clear, but the complexity of the sound generation control increases
Solution Approach 1:
The system changes the pitch parameter of additional sounds relative to the fundamental sound to encode different guidance meanings. By adjusting the pitch difference parameter between the fundamental sound and additional sounds, the system reliably conveys whether acceleration or deceleration is required. This parameter-based encoding is more reliable than temporal patterns alone while maintaining manageable control complexity.
Data Source
AI summary
A driving assistance device includes a storage medium configured to store computer-readable instructions, and a processor connected to the storage medium, in which the processor executes the computer-readable instructions to determine whether to urge a driver of a mobile object to accelerate or decelerate on the basis of a state of the mobile object, to cause a speaker to output a notification sound urging the driver of the mobile object to accelerate or decelerate on the basis of a result of the determination, to cause the speaker to output a fundamental sound when causing the speaker to output the notification sound, and then cause the speaker to output one or more additional sounds whose pitch is different from a pitch of the fundamental sound, and to cause the speaker to output the one or more additional sounds whose pitch is higher than the pitch of the fundamental sound when the driver of the mobile object is urged to accelerate.