"Aimulet LA is designed to be held up to your ear like a cellphone. When you stand over special LED emitters set into the ground, Aimulet LA receives the light signals via an array of spherical micro solar cells (called Sphelar by manufacturer Kyosemi) set into the bottom of the handset. Aimulet LA translates the signals into audio messages that are transmitted through a tiny speaker in the device. In Laurie Anderson’s installation, visitors used Aimulet LA to listen to poems in four different languages as they strolled through a Japanese-style garden."
The blog, Pink Tentacle where I saw this post is also super cool.