Janet Cardiff (collaborating with Geroge Bures Miller)

Contemporary artists working sight-specifically. Sound as medium. Audio walks. 



http://www.cardiffmiller.com/index.html

Missing Voice, case study B: http://www.cardiffmiller.com/artworks/walks/missing_voice.html 
Mallins' Night Walk: http://www.cardiffmiller.com/artworks/walks/mallin.html