Truck Cab Spatial Audio Alerts for Directional Hazard Indication
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Solution Overview
Problem
Existing ADAS systems in trucks are ineffective in safely and effectively conveying the type and location of hazards to drivers, often requiring them to divert their attention to identify the hazard, which increases risk, especially due to obstructed views from trailers.
Innovation Solution
Systems and methods that generate spatial audio alerts using ultrasonic transducers or conventional audio speakers to emit audio signals that appear to originate from the hazard's location, incorporating sensors to detect hazards and processors to control audio properties, providing spoken language alerts for hazard nature and location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If different alert tones are used to indicate different types of hazards, then hazard information can be conveyed to the driver, but the driver must divert attention to identify the type and location of the hazard, increasing risk
Solution Approach 1:
The patent applies acoustic analogs of color changes by using different audio characteristics (frequency, spatial position, timbre) to encode different hazard types and locations. Just as color changes convey different meanings visually, the system uses audio property changes to convey hazard information intuitively without requiring driver analysis or attention diversion.
Solution Approach 2:
The patent adds spatial dimension to audio alerts by positioning sound sources in three-dimensional space around the driver. Instead of using only temporal or frequency variations, the system utilizes spatial positioning to convey location information, and potentially timbre variations to convey hazard type, creating a multi-dimensional alert system that provides rich information without requiring driver attention.
2Device complexity
If traditional audio alerts are used, then the system structure remains simple, but the alerts are ineffective at informing the driver of the type and location of the hazard
Solution Approach 1:
The patent enhances traditional audio alerts by adding spatial positioning capabilities. Instead of simple mono or stereo speakers, the system uses multiple transducers arranged in three-dimensional space to create directionally-encoded audio alerts. This dimensional enhancement allows the system to convey location information through spatial position while maintaining relatively simple device architecture.
Solution Approach 2:
The patent applies local quality by assigning different audio characteristics to different spatial locations and hazard types. Each transducer or group of transducers can emit alerts with specific spatial positions and audio properties tailored to the detected hazard, providing localized, context-appropriate information without requiring complex system-wide changes.
3Measurement precision
If ultrasonic transducers are used to generate spatial audio alerts, then hazard location can be accurately indicated, but the system complexity increases compared to conventional speakers
Solution Approach 1:
The patent replaces conventional acoustic speakers with ultrasonic transducers that operate on different physical principles. Instead of using mechanical vibration of diaphragms at audible frequencies, the system uses ultrasonic piezoelectric transducers that convert electrical signals to high-frequency mechanical vibrations, which then interact with the environment to create spatial audio effects. This substitution enables more precise spatial encoding while potentially simplifying the control electronics.
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
Enables drivers to identify hazard nature and location without diverting attention, enhancing safety by clearly indicating the type and location of hazards through spatial audio alerts.
Implementation Method 1
emitting, from the one or more ultrasonic transducers, an ultrasonic carrier wave modulated with audio content directed toward a location based on the direction of the hazard
Implementation Method 2
the ultrasonic carrier wave demodulates upon contacting an interior surface of the cab of the truck and generates a spatial audio alert audible from the location based on the direction of the hazard
Data Source
AI summary
A system for generating spatial audio alerts comprises one or more ultrasonic transducers disposed in a cab of a truck; one or more sensors disposed in or around the truck; one or more processors; and one or more computer readable media storing instructions that, when executed by the one or more processors, cause the system to: detect, by the one or more sensors, a hazard; identify a direction of the hazard relative to a driver of the truck; and generate a spatial audio alert, wherein generating a spatial audio alert comprises emitting, from the one or more ultrasonic transducers, an ultrasonic carrier wave modulated with audio content directed toward a location based on the direction of the hazard, wherein the ultrasonic carrier wave demodulates upon contacting an interior surface of the truck and generates a spatial audio alert audible from the location based on the direction of the hazard.