Sound Vest Vibratory Motor Array for Haptic Audio
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Solution Overview
Problem
Current wearable technologies for the hearing impaired primarily rely on simple sensory substitution, failing to effectively convey the nuances of sound through haptic feedback, particularly in representing music and auditory cues in real-time with precision and depth.
Innovation Solution
A system utilizing vibratory motors integrated into wearable technology, such as a sound vest, that performs real-time spectral analysis of audio input to generate haptic signals, mapping different frequency components to specific parts of the body, enabling a more immersive and accurate representation of sound through a network of up to 128 motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple sensory substitution is used in wearable technologies for the hearing impaired, then the device complexity is reduced, but the measurement precision and information fidelity of sound representation deteriorates
Solution Approach 1:
The patent segments the audio spectrum into multiple frequency bands (e.g., bass, mid-range, treble) and maps each band to specific regions of the body through separate haptic actuators. This segmentation allows complex sound information to be distributed across multiple simple haptic channels, resolving the contradiction between device simplicity and sound representation fidelity.
Solution Approach 2:
The patent transitions from auditory dimension to tactile dimension by mapping sound frequencies to spatial locations on the body. Different frequency components are represented at different body positions (e.g., low frequencies on the chest, high frequencies on the shoulders), adding a spatial dimension to haptic feedback that enhances sound differentiation without requiring complex single-point actuators.
2Measurement precision
If real-time spectral analysis is performed to map frequency components to body parts, then the accuracy of sound differentiation is improved, but the processing time and computational requirements increase
Solution Approach 1:
The patent applies partial spectral analysis by focusing on specific frequency bands relevant to different sound elements rather than analyzing the entire spectrum in detail. This selective analysis approach maintains real-time performance while achieving sufficient accuracy for distinguishing music genres and environmental sounds.
Solution Approach 2:
The system performs preliminary classification of audio input to identify the type of sound (music, speech, environmental) and then applies appropriate spectral analysis parameters. This preliminary action allows the system to optimize processing in real-time by adjusting analysis depth based on the detected sound category.
3Adaptability or versatility
If a network of multiple vibratory motors is integrated into the wearable device, then the haptic feedback capability and sound representation are enhanced, but the device weight and manufacturing complexity increase
Solution Approach 1:
The patent implements local quality by placing different types and densities of haptic actuators in specific body regions corresponding to different frequency ranges. For example, more actuators are placed on the chest for bass frequencies while fewer are placed on the shoulders for treble frequencies. This localized distribution enhances haptic feedback capability while minimizing overall device weight.
4Ease of operation
If the vibratory motors are made thin and woven into the garment, then the wearability and comfort are improved, but the manufacturing precision and motor performance deteriorate
Solution Approach 1:
The patent uses flexible printed circuit boards and thin-film actuator technologies that can be woven or integrated directly into garment fabric. These thin-film implementations maintain sufficient motor performance for haptic feedback while achieving the flexibility and thinness required for comfortable wearability.
Solution Approach 2:
The system employs composite materials that combine conductive threads, flexible substrates, and miniaturized motor components into a unified wearable structure. This composite approach integrates the motor functions directly into the garment fabric, achieving both wearability and functional performance through material innovation rather than traditional assembly.
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 a more immersive and accurate experience of music and auditory cues for the hearing impaired by translating sound into haptic sensations, allowing users to differentiate between various sound elements, including music genres and environmental sounds, enhancing their ability to engage with music and daily auditory inputs.
Implementation Method 1
A system utilizes vibratory motors integrated into wearable technology, such as a sound vest, that performs real-time spectral analysis of audio input to generate haptic signals
Implementation Method 2
The motors are then powered based on the magnitude of the spectral power. A preliminary design of the system enables the use of up to 64 motors to represent the incoming audio
Data Source
AI summary
Vibratory motors are used to generate a haptic language for music or other sound that is integrated into wearable technology. The disclosed system enables the creation of a family of devices that allow people with hearing impairments to experience sounds such as music or other auditory input to the system. For example, a “sound vest” or one or more straps comprising a set of motors transforms musical input to haptic signals so that users can experience their favorite music in a unique way, and can also recognize auditory cues in the user's everyday environment and convey this information to the user using haptic signals.