Introduction

A tongue-operated assistive technology that enables individuals with severe physical

impairments to control their environments. 1

Tongue Drive System: HardwareHeadset Components

1. Sensors:Four 3-axial magneto-resistive sensors (two on each pole)

3. Control Unit:MCU: TI CC25102.4 GHz RF Transceiver

2. Magnet:Disk-shaped [4.8mm 1.5mm]Embedded in a titanium tongue stud

4. Battery:130 mAh, 3.7 V, plus power management circuit

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Tongue Drive System: Commands

TDS Discrete Commands Positions

TDS Waveforms Samples of each Command

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Left-SideCommands

Right-SideCommands

Terminology

Classifier Combinations Stacking Majority Voting (Nine Classifiers)

Assessment Correctness Rejection Error? Misclassification Error

Five Bayesian: Linear Dia. Linear Quadratic Dia. Quad. MahalanobisFour KNNs: Euclidean City Block Cosine Correlation

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Previous Work: mSSP Algorithm

RestingLeftUpLeft Click

RestingRightDownRight Click

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Methodology

Human Trials Dataset: Able-bodied subjects from two

Universities (4-NUB & 4-GTB) 8 participants x 5 sessions = 40

experiments

Calibration Training Testing6

ITR

Results and Analysis:First Stage: Left-Side vs. Right-Side Classification

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NUB = Northwestern UniversityGTB = Georgia Tech 20.1

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2.02%