Wearable Spatial Audio Detection for Hazard Alerting
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Solution Overview
Problem
Hearing-impaired individuals face challenges in detecting and reacting to potentially dangerous events in their environment, as they may not be able to perceive audio warnings, especially when the source of the hazard is outside their field of view.
Innovation Solution
A wearable device equipped with multiple sound sensors and alerting elements, such as vibrations or visible alerts, that can detect sounds indicative of dangerous events and provide spatial awareness of the sound source through tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio warnings are used to alert hearing-impaired individuals of dangerous events, then the warning system is simple and effective for hearing individuals, but hearing-impaired individuals cannot perceive the warnings especially when the source is outside their field of view
Solution Approach 1:
The patent replaces the acoustic warning system with a haptic feedback system. Multiple vibration motors are positioned at different locations on the wearable device to generate tactile patterns that convey directional information about dangerous events, enabling hearing-impaired individuals to perceive warnings through touch rather than sound
Solution Approach 2:
The patent introduces sound sensors as intermediaries that detect audio warnings in the environment and convert them into tactile feedback through vibration motors. The sound sensors capture acoustic signals from all directions, and the controller processes this information to activate appropriate haptic elements, bridging the gap between audio warnings and hearing-impaired users
2Measurement precision
If multiple sound sensors are installed in the wearable device to detect sound direction, then spatial awareness is improved, but device complexity increases
Solution Approach 1:
The patent divides the wearable device into multiple segments, each equipped with sound sensors and vibration motors. This segmentation allows the system to detect sound directions from different spatial zones independently, improving angular resolution and directional accuracy without requiring a single complex sensor system
Solution Approach 2:
The patent transitions from detecting sound intensity alone to detecting sound direction by adding spatial dimensionality. Multiple sound sensors positioned at different locations on the wearable device enable the system to determine the angular position of sound sources, converting a one-dimensional intensity measurement into two-dimensional directional information
3Reliability
If haptic feedback is provided for all detected sounds, then hearing-impaired individuals receive comprehensive warnings, but false alarms increase for non-dangerous sounds
Solution Approach 1:
The patent applies partial action by selectively activating only the vibration motors corresponding to the detected sound direction rather than activating all motors. This selective activation reduces false alarms while maintaining comprehensive coverage, as the system responds with targeted haptic feedback only when and where needed
Solution Approach 2:
The patent implements a feedback mechanism where the controller continuously monitors sound sensor input and adjusts vibration motor activation in real-time. The system provides haptic feedback proportional to the detected sound characteristics, allowing hearing-impaired individuals to distinguish between different types of events based on the pattern and intensity of vibrations received
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
The system effectively enhances the environmental awareness of hearing-impaired individuals by providing non-auditory alerts that indicate the presence, direction, and intensity of potentially dangerous sounds, enabling them to react promptly to hazards.
Implementation Method 1
A wearable device equipped with multiple sound sensors and alerting elements, such as vibrations or visible alerts, that can detect sounds indicative of dangerous events
Implementation Method 2
A wearable device equipped with multiple sound sensors and alerting elements, such as vibrations or visible alerts, that can detect sounds indicative of dangerous events and provide spatial awareness of the sound source through tactile feedback
Data Source
AI summary
A system includes a wearable device, a plurality of sound sensors installed in the wearable device, an alerting element installed in the wearable device, and a controller coupled to the plurality of sound sensors and the alerting element. The controller receives a signal indicative of a sound detected by at least one of the plurality of sound sensors, determines whether the sound indicates the presence of a potentially dangerous event, determines a direction of the sound based on the received signal indicative of the sound, if the sound indicates the presence of the potentially dangerous event, activate the alerting element; and if the sound does not indicate the presence of the potentially dangerous event, not activate the alerting element.