Low cost headset connects to Nokia phone
By Nick Flaherty www.flaherty.co.uk
Researchers in Denmark have developed a fully functional smartphone brain scanner with a a low-cost 14-channel EEG headset with a wireless connection to a Nokia N900 smartphone. This provides a touch-based interface with real-time brain state decoding and 3D reconstruction and enables minimally invasive EEG monitoring in naturalistic settings.
Developed at milab, part of the Cognitive Systems Section at DTU Informatics in Copenhagen, the system provides a fully portable real-time functional brain scanner including stimulus delivery, data acquisition, logging, brain state decoding and 3D activity visualization. The headset transmits the EEG data to a receiver module connected to a Nokia N900 phone and the data is decrypted directly on the phone, filtered and passed to the source reconstruction module that outputs the visualization. The source reconstruction is performed over number of samples (default over 16 samples resulting in 8Hz visualization). The delay between the signal appearing in the headset and being visualized on the screen depends on the used source reconstruction window and is between 130 and 150 msec for 8Hz visualization. The frame rate of the visualization (in OpenGL) is around 30fps.
The video demonstrates the smartphone brain scanner with the Emotiv 14-channel EEG headset worn by a subject and a real-time 3D brain reconstruction and activity visualization on the N900 smartphone.
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