Ear-worn Tactile Interface for Sound Localization
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Solution Overview
Problem
Individuals with hearing loss, including those with single-sided deafness, bilateral hearing loss, and hearing aid users, face challenges in localizing sound sources, leading to increased cognitive loading and reduced reaction times to environmental dangers, especially in complex social or environmental situations.
Innovation Solution
A directional indication system comprising units worn on each ear, equipped with tactile output devices and communication modules, which communicate to provide tactile feedback indicative of sound source direction, allowing users to perceive sound location through vibrations independent of sound frequency and aiding in three-dimensional direction determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hearing aids are used to amplify sound for individuals with hearing loss, then hearing ability is improved, but sound localization capability deteriorates
Solution Approach 1:
The patent introduces tactile output devices as an intermediary modality to convey directional information about sound sources. These devices translate acoustic spatial information into tactile sensations that can be felt through bone conduction or direct skin contact, allowing users to localize sounds without relying solely on auditory cues that hearing aids may distort or internalize
Solution Approach 2:
The patent replaces the natural auditory localization mechanism (which is impaired when using hearing aids) with a tactile feedback system. By substituting the acoustic/mechanical hearing path with a tactile sensation path through bone conduction or skin contact, the system restores directional awareness without the localization deficits caused by hearing aid amplification
2Measurement precision
If visual cues and physical movement are used for sound source localization, then localization capability is improved, but reaction time to environmental dangers deteriorates
Solution Approach 1:
The patent provides immediate tactile feedback about sound source direction as soon as a sound is detected, eliminating the need for subsequent visual confirmation or physical movement to determine location. This preliminary provision of directional information through tactile cues allows users to react instantly to potential dangers without the time delay associated with visual scanning or head movements
Solution Approach 2:
The system implements real-time feedback by continuously monitoring acoustic inputs and providing corresponding tactile directional cues. This closed-loop feedback mechanism allows users to maintain awareness of sound source locations without active visual or motor engagement, enabling faster reactions to environmental changes
3Measurement precision
If tactile output devices are added to provide directional information, then sound localization capability is improved, but device complexity increases
Solution Approach 1:
The patent integrates tactile output devices into existing hearing aid platforms, allowing the same device to provide both auditory amplification and tactile directional feedback. This multi-functionality approach consolidates multiple capabilities into a single wearable system, reducing overall complexity compared to separate auditory and tactile devices
Solution Approach 2:
The patent combines the hearing aid and tactile feedback system into a unified device architecture. By merging the acoustic processing and tactile output functions into a single integrated system, the patent reduces the number of separate components and interfaces the user must manage, thereby reducing perceived and operational complexity
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
Enhances sound localization capabilities for individuals with hearing impairments, improving cognitive efficiency and reaction times by providing tactile cues for sound source direction, thereby facilitating communication and safety in various environments.
Implementation Method 1
the tactile output device may be configured to deliver the tactile output through bone conduction
Implementation Method 2
produce a tactile output... The tactile output device may include an eccentric rotating mass vibration motor
Data Source
AI summary
A system for indicating a direction to a user is disclosed. The system may include a first unit and a second unit to be worn proximate to a first ear and a second ear of the user respectively. The system may indicate a direction to the user through tactile sensations delivered proximate to the ears of the user by the first and second units. The system may also include microphones to aid in determining the direction of a source of a sound and the system may indicate the determined direction, thereby allowing the user to localize the sound. The system may also function as hearing aids. The system may aid individuals with hearing disabilities by alerting them to the direction of the source of a sound.