Opaque glasses are used to block out extraneous light and two white 55 degree LED's provide light stimulation using a square wave with a duty cycle ratio of 50/50, which has been shown to more strongly entrain brain rhythms through the frequency following response.
The light is reflected onto a screen which flickers at 40Hz. The LED's provide light stimulation that has been shown to activate areas of the frontal cortex and it is thought that there may be a synergistic effect of combining this light spectrum with the 40Hz flicker stimulation.
Research Articles:
Cool White LED with peak spectrum of 460-465nm/Blue enriched light:
Average Lux: 125Max Lux: 250
Sound is delivered through on ear headphones with an in-line volume adjust and non-tangle cord.
The circuit is housed in a white high-impact ABS rectangular plastic box. The box is powered by one 9 volt battery. It has one 5.2x2.1mm DC jack for the glasses and a 3.5mm port for the headphones. It is operated by a single switch, which when turned on will give timed audio visual stimulation for one hour. Every 15 minutes there is a 1 second pause to give the user a sense of time elapsed during a session. A battery indicator is present and will alert of low-power when a new battery is required.
The devices are calibrated to 40hz with a minimum accuracy of 99% over a period of one hour.
*No claim is made regarding this device to treat or diagnose any illness.