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Biological surface electromyographic switch and necklace-type button switch control as an augmentative and
DongGeon Lee1, SeungJun Lee2, Kuem Ju Lee3
1Department of Physical Therapy, Graduate School of Kyungnam University, Changwon, Republic of Korea.
Summary
This study developed novel augmentative and alternative communication (AAC) devices, including an electromyographic (EMG) switch and a button switch, to improve communication for individuals with speech impairments. Feasibility testing revealed areas for improvement, leading to enhanced designs with high practical feasibility.
Area of Science:
- Biomedical Engineering
- Assistive Technology
- Human-Computer Interaction
Background:
- Individuals with speech or language impairments often require augmentative and alternative communication (AAC) to support their interaction.
- Existing AAC solutions may present challenges in usability, customization, or physical integration for diverse user needs.
Purpose of the Study:
- To develop and evaluate novel AAC devices, specifically an electromyographic (EMG) switch and a necklace-type button switch.
- To identify user-reported inconveniences and desired improvements for these AAC devices through feasibility testing.
- To refine the AAC device designs based on user feedback to enhance overall feasibility and usability.
Main Methods:
- Development of an electromyographic (EMG) switch involving signal processing (acquisition, amplification, filtering, rectification, smoothing) and a switch interface processor for Bluetooth transmission to smart devices.
- Development of a necklace-type button switch with similar signal processing and transmission capabilities.
- Conducting two feasibility tests with multiple sessions to gather user feedback on device performance, comfort, and ease of use.
Main Results:
- Feasibility testing identified specific user-reported issues: intricacy of settings for the EMG switch, and device shifting, volume, weight, and directional fixing for the button switch.
- User feedback directly informed the development of an additional, refined device to address identified inconveniences.
- The final, improved EMG and button switch designs demonstrated high feasibility in addressing the previously noted issues.
Conclusions:
- The developed AAC devices, incorporating EMG and button switch technologies, show promise for enhancing communication in individuals with speech impairments.
- Iterative design based on user feedback is crucial for optimizing the functionality and user experience of assistive communication technologies.
- The refined AAC solutions present a feasible and potentially impactful advancement in the field of augmentative and alternative communication.
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