A signature characteristic of Lozano-Hemmer's art is that, although interactive, his works are triggered by 'secondary' aspects of the physical presence: a cast shadow; a detected movement; a voice, or remote intervention via the internet or mobile device.
In keeping with this practice, Lozano-Hemmer's various Pulse projects convert the rhythms of the heartbeat into visible phenomena.
Pulse Room, shown above, features a room filled with incandescent light bulbs. An interface positioned at the side of the space contains a sensor that measures the pulse of whoever touches it, instantly causing a bulb to flash at the exact rate of their heart.
Variations of this work include Pulse Tank, in which cardiac rates cause ripples to extend across the illuminated surface of a water-filled vitrine, and Pulse Park (2008), an ambitious intervention in New York's Central Park in which sophisticated sensors were used to detect the collective heart rates of participants and synchronise these to the flashing of dozens of white beacons.