The Mindwave gathers EEG measurements from the FP1 region
of the cortex which is known to manage learning, mental
states, and concentration [16]. The hardware uses the A1 region
for grounding and filtering the signal via common-mode
rejection and additionally utilizes notch filters, analog and
digital low- and high-pass filters, and proprietary algorithms
to remove EMG artifacts and other noise. The effectiveness
of this filtering was verified through pretests that assessed the
presence of common artifacts such as eye-blinks. The device
samples at a rate of 512 Hz and is sensitive to frequencies
in the range of 3–100 Hz, which are broken into alpha, beta,
theta, and gamma waves using Fast Fourier Transforms.