Stimulus Generating Device

A device for producing stimuli is needed. Depending on the choice of the stimulus, this can be speakers (for auditory stimuli), a computer screen or computer-controllable LEDs bright enough to lighten the room with an intensity noticable through closed eyes (for visual stimuli), tactile devices, or other.

It is also possible to use multiple stimuli simultaneously, which might increase the incorporation probability and communication speed on the one hand, but on the other hand might also lead to premature awakenings.