Evaluation of spatio-temporal electrocutaneous warning signals

Abstract Acoustic or visual warning signals for workers in hazardous situations might fail under loud and/or lowvisibility work situations. A system that uses electrocutaneous stimulation can overcome this problem. The aim of pilot study was to find spatio-temporal patterns appropriate electrical warning. Eight electrode pairs were attached the upper right arm 16 participants. conducted with bi-phasic rectangular pulses 150 μs and an amplitude up 25 mA. Pulse intervals generate a single pulse, pulsating, vibrating, continuous perception as well varying spatial (e.g. alternating between circumferentially around arm) investigated evaluated regard alertness, discomfort, urgency. revealed signal generates vibrating is applied circumferential showed highest values alertness therefore considered potential pattern future studies larger groups.