Helmet Haptic Feedback Array for Rapid Directional Sound Alerts
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Solution Overview
Problem
Conventional haptic feedback systems are not effectively integrated into wearable items, limiting their ability to provide rapid and accurate directional alerts in hazardous environments, such as tactical situations, where sounds like gunfire or explosions require immediate attention.
Innovation Solution
A wearable haptic feedback device with a circular frame and microphone array on a helmet computes the direction of sound sources, using vibratory elements to provide immediate directional cues as the user turns their head, integrating a sensory processor and accelerometer to maintain feedback alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional haptic feedback systems are used in handheld devices, then they can generate vibratory sensation for enhancing user experience, but they cannot provide rapid directional alerts in hazardous environments
Solution Approach 1:
The haptic feedback system is segmented into multiple independent vibratory actuators arranged in a circular array around the user's head. Each actuator can be independently controlled to provide directional haptic feedback, allowing the system to indicate the direction of sound sources while maintaining reliability in hazardous environments.
Solution Approach 2:
The haptic feedback device is nested within a wearable helmet structure, with the circular frame and vibratory elements integrated into the helmet's interior. This nesting approach enables the system to function as a wearable device without adding significant bulk or compromising the protective function of the helmet.
2Loss of time
If conventional sound detection devices are used, then they can locate sound sources graphically on a visual screen, but they require insufficient response time in hazardous environments
Solution Approach 1:
The system replaces visual display and manual interaction with direct haptic feedback. Instead of requiring the user to visually locate and interpret graphical representations of sound sources, the vibratory actuators directly indicate direction through tactile sensation, dramatically reducing response time and eliminating the need for complex user interaction.
Solution Approach 2:
The haptic feedback system provides self-service directional indication without requiring user intervention for interpretation. The pattern of activated vibrators automatically communicates the direction of the sound source to the user's tactile sense, eliminating the time-consuming process of visual assessment and manual response.
3Adaptability or versatility
If a circular array of vibratory elements is used, then haptic feedback can follow the sound source as the user turns their head, but the device complexity increases
Solution Approach 1:
The circular array of vibratory elements serves multiple functions: it provides directional sound source indication, tracks head movements, and maintains feedback alignment as the user rotates. This multi-functionality reduces the need for separate systems and minimizes overall device complexity while achieving head tracking capability.
Solution Approach 2:
The system uses accelerometers to detect head rotation and provides real-time feedback by adjusting which vibrators are activated. This feedback mechanism allows the haptic indication to follow the sound source as the user turns their head, creating an adaptive system that maintains accuracy without requiring complex mechanical tracking components.
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 provides rapid and accurate haptic feedback that follows the sound source as the user turns, allowing for immediate awareness of the sound direction, enhancing safety in tactical and industrial environments.
Implementation Method 1
a plurality of sensing elements disposed on a perimeter of the circular frame for defining a beamforming sensory array
Implementation Method 2
A plurality of feedback elements is also disposed on the circular frame for haptic user interface (UI) sensations
Data Source
AI summary
A wearable device generates haptic feedback around a 360 degree range for indicating an audio stimuli. The user/wearer receives the haptic feedback for indicating a direction from which the audio stimuli emanated. A helmet housing the device includes vibratory elements arranged in a circular frame responsive to microphones around an outer perimeter of the helmet. The frame fits snugly over a user's head, and upon detection of a distal sound by the microphones, computes and activates vibratory element corresponding to the source of the sound. The vibratory elements are arranged in a circular array, and a signal processor is particularly tuned for detecting a sharp sound such as gunfire or munition explosion. Successive sounds are followed by the haptic feedback as the user turns their head. In a tactical environment, the frame may be mounted inside a helmet and the microphones placed around the outer helmet perimeter.