Researchers at the University of Texas at Austin have developed wireless electronic tattoos capable of detecting high levels of mental stress. These temporary tattoos, resembling small patches, use sensors to decode brainwaves and offer a cost-effective alternative to traditional EEG.
The e-tattoos utilize a lightweight battery and thin sensors that adapt to the skin. Facial features are measured to ensure sensor placement accuracy. They monitor theta and delta brainwave activity for cognitive performance, and alpha and beta activity to detect mental fatigue. A computer model corroborates the tattoos' stress-detection capability.
The e-tattoo's chip and battery cost $200, while disposable sensors cost roughly $20, significantly cheaper than traditional EEG devices (over $15,000). Future plans include combining these tattoos with active electronic ink on hair for a more comprehensive signal detection.
Potential applications include monitoring mental workload in professions like air traffic controllers and truck drivers, where lapses in concentration can be dangerous, and furthering our understanding of human-machine interaction.